im·pair 
(ĭm-pâr)
(ĭm-pâr)tr.v. im·paired, im·pair·ing, im·pairs
To cause to weaken, be damaged, or diminish, as in quality: an injury that impaired my hearing; a severe storm impairing communications.
[Middle English empairen, from Old French empeirer, from Vulgar Latin *impēiōrāre : Latin in-, causative pref.; see IN-2 + Latin pēior, worse; see ped- in the Appendix of Indo-European roots.]
im·pairment n.
- Indo-European root: dhreg-
- Indo-European root: dhreibh-
- Indo-European root: dhreu-
- Indo-European root: dhugəter-
- Indo-European root: dhwer-
- Indo-European root: dhē-
- Indo-European root: dhē(i)-
- Indo-European root: dhēs-
- Indo-European root: dhīgw-
- Indo-European root: dlegh-
- Indo-European root: dn̥ghū-
- Indo-European root: dus-
- Indo-European root: dwo-
- Indo-European root: dyeu-
- Indo-European root: dā-
- Indo-European root: dō-
- Indo-European root: ed-
- Indo-European root: eg
- Indo-European root: eghs
- Indo-European root: egwh-
- Indo-European root: ei-
- Indo-European root: eis-
- Indo-European root: ekwo-
- Indo-European root: el-
- Indo-European root: em-