Unexpected.

Of actions, events, conditions: Happening or coming without warning or premonition; taking place or appearing all at once.

Unexpected, unforeseen. Obsolete.

Unexpected, unforeseen.

Not thought of or imagined; unexpected.

Unexpected, unlooked-for. Obsolete.

Not expected; unanticipated or unforeseen. Sometimes also as adv.: unexpectedly, without warning.

unexpected, unlooked for.

Astonishing.

Not expected; unanticipated or unforeseen; = unlooked for, adj. Obsolete.

Not thought of, unexpected.

Unexpected, unlooked-for. Obsolete.

Unsuspected, unexpected.

Not expected; unexpected, unlooked-for.

(un-, prefix1 affix 2.)

Unexpected. Obsolete. rare.

(un-, prefix1 affix 2c.)

Not mistrusted.

Not thought of; unlooked for; unexpected.

(un-, prefix1 affix 2b affix 2c.)

That catches one napping; unexpected.

That causes a shock of surprise; that suddenly and forcibly compels attention.

Unexpected, unlooked for.

Unexpected.

Exciting wonder, to be marvelled at; wonderful, remarkable, astonishing, surprising. Now rare.

Unexpectedly arising, urgent; = emergent, adj. 5.

Not presumed.

Esp. of change or movement: occurring suddenly, unexpectedly, or without warning; sharp; precipitate, hasty. In later use also: characterized by…

Not guessed at, not dreamt of.

(un-, prefix1 affix 2.)

Not predicted; unexpected, unforeseen.

Having no immediate or apparent cause; unprompted, unprovoked. Also: unanticipated.

(un-, prefix1 affix 2.)

Not supposed or imagined.

Unexpected.

attributive (from sense 1): That is a windfall; blown down by the wind: = compounds 2. Also figurative (from sense 2): Casual, ‘chance’. Also…

Offered or sent without the prior agreement of the recipient; (esp. of a manuscript, etc.) uncommissioned, unsolicited, unexpected.

Of an event or fact, esp. a success: unexpected or surprising.

that dumbfounds, startling.