obvertv.

Brit.

/əbˈvəːt/,

/ɒbˈvəːt/, U.S.

/əbˈvərt/,

/ɑbˈvərt/

Forms: 1500s–1600s obuert, 1600s– obvert.

Origin: A borrowing from Latin. Etymon: Latin obvertere.

Etymology: < classical Latin obvertere to turn towards, to turn one's attention to, to direct against < ob- ob- prefix + vertere to turn (see vert v.¹).

†1. transitive. Originally: to turn one's attention to (a subject) (rare). Later: to place (something) facing, to turn (something) to, towards. Obsolete.

ΘΚΠ

the world > space > direction > direct [verb (transitive)] > face a direction > cause to face a direction

obvert1583

orient1842

orientate1880

reorient1975

1583 P. Barrough Methode of Phisicke sig. ^*iii^v I will obuert and turne against all the venemous bitinges of sclanderous tongues.

1623 H. Cockeram Eng. Dict. Obuert, to turne against one.

1646 Sir T. Browne Pseudodoxia Epidemica vi. vii. 309 The rooms of cænation in the Summer, he obverts unto the Winter ascent, that is, South-East.

1686 J. Goad Astro-meteorologica i. xv. 95 The Lunar Light being obverted towards us..in the Quadrates.

1712 S. Cobb Callipædia iii. 42 If tow'rd the opening Womb the Infant bend His forward Feet, or either Hand extend, Or Back obverted to the Face expose, And double the tormented Mother's Throws, Let the wise Midwife's gentle Hand restrain The dangerous Errour.

a1754 E. Tollet Poems Several Occasions (1755) 129 Or to describe how this terrestrial Ball..to the Morning Ray Obverts its Front.

1781 J. Wesley Wks. (1872) IV. 211 If the northern hemisphere be obverted to the sun longer than the southern.

†2. transitive. To turn (a thing) in a contrary direction. Obsolete.

ΘΚΠ

the world > space > direction > direct [verb (transitive)] > reverse the direction of

reverse?a1439

return1483

to turn back1579

alternate1595

re-enverse1603

retrovert1637

obvert1646

the world > time > change > change to something else, transformation > change of direction, reversion > change back [verb (transitive)] > to opposite

convert1612

interverta1639

obvert1646

refund1665

reverse1944

1646 Sir T. Browne Pseudodoxia Epidemica 60 If wee place a Needle touched at the foote of tongues or andirons, it will obvert or turne aside its lyllie or North point, and conforme its cuspis or South extreme unto the andiron.

1657 R. Tomlinson tr. J. de Renou Physical Inst. iv, in Medicinal Dispensatory sig. S That the manner of preparation and mixtion be not obverted thereby.

3. transitive. Logic. To change (a proposition) by obversion.

ΚΠ

1870 A. Bain Logic i. 110 Obvert the predicate, and prefix the sign of negation.

1896 J. Welton Man. Logic (ed. 2) I. iii. iii. 251 The one simple rule for obverting any proposition:—Negative the predicate and change the quality, but leave the quantity unaltered.

1929 Jrnl. Philos. 26 162 He..proceeds to show how it can be done, namely, by obverting the converse.

1965 Mind 74 67 Given any semi-syllogism, its associated canonical syllogism is that canonical syllogism obtained by obverting all of its A and O propositions.

1995 Oxf. Compan. Philos. 632/2 All the four forms of proposition considered by traditional logic may be validly obverted.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	obvert
释义	obvertv. Brit. /əbˈvəːt/, /ɒbˈvəːt/, U.S. /əbˈvərt/, /ɑbˈvərt/ Forms: 1500s–1600s obuert, 1600s– obvert. Origin: A borrowing from Latin. Etymon: Latin obvertere. Etymology: < classical Latin obvertere to turn towards, to turn one's attention to, to direct against < ob- ob- prefix + vertere to turn (see vert v.¹). †1. transitive. Originally: to turn one's attention to (a subject) (rare). Later: to place (something) facing, to turn (something) to, towards. Obsolete. ΘΚΠ the world > space > direction > direct [verb (transitive)] > face a direction > cause to face a direction obvert1583 orient1842 orientate1880 reorient1975 1583 P. Barrough Methode of Phisicke sig. ^iii^v I will obuert and turne against all the venemous bitinges of sclanderous tongues. 1623 H. Cockeram Eng. Dict.* Obuert, to turne against one. 1646 Sir T. Browne Pseudodoxia Epidemica vi. vii. 309 The rooms of cænation in the Summer, he obverts unto the Winter ascent, that is, South-East. View more context for this quotation 1686 J. Goad Astro-meteorologica i. xv. 95 The Lunar Light being obverted towards us..in the Quadrates. 1712 S. Cobb Callipædia iii. 42 If tow'rd the opening Womb the Infant bend His forward Feet, or either Hand extend, Or Back obverted to the Face expose, And double the tormented Mother's Throws, Let the wise Midwife's gentle Hand restrain The dangerous Errour. a1754 E. Tollet Poems Several Occasions (1755) 129 Or to describe how this terrestrial Ball..to the Morning Ray Obverts its Front. 1781 J. Wesley Wks. (1872) IV. 211 If the northern hemisphere be obverted to the sun longer than the southern. †2. transitive. To turn (a thing) in a contrary direction. Obsolete. ΘΚΠ the world > space > direction > direct [verb (transitive)] > reverse the direction of reverse?a1439 return1483 to turn back1579 alternate1595 re-enverse1603 retrovert1637 obvert1646 the world > time > change > change to something else, transformation > change of direction, reversion > change back [verb (transitive)] > to opposite convert1612 interverta1639 obvert1646 refund1665 reverse1944 1646 Sir T. Browne Pseudodoxia Epidemica 60 If wee place a Needle touched at the foote of tongues or andirons, it will obvert or turne aside its lyllie or North point, and conforme its cuspis or South extreme unto the andiron. View more context for this quotation 1657 R. Tomlinson tr. J. de Renou Physical Inst. iv, in Medicinal Dispensatory sig. S That the manner of preparation and mixtion be not obverted thereby. 3. transitive. Logic. To change (a proposition) by obversion. ΚΠ 1870 A. Bain Logic i. 110 Obvert the predicate, and prefix the sign of negation. 1896 J. Welton Man. Logic (ed. 2) I. iii. iii. 251 The one simple rule for obverting any proposition:—Negative the predicate and change the quality, but leave the quantity unaltered. 1929 Jrnl. Philos. 26 162 He..proceeds to show how it can be done, namely, by obverting the converse. 1965 Mind 74 67 Given any semi-syllogism, its associated canonical syllogism is that canonical syllogism obtained by obverting all of its A and O propositions. 1995 Oxf. Compan. Philos. 632/2 All the four forms of proposition considered by traditional logic may be validly obverted. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < v.1583
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