An Etymological Dictionary of Astronomy and Astrophysics

Not powerful or intense.
→ electroweak epoch, → electroweak force, → electroweak interaction, → weak anthropic principle, → weak arm spiral galaxy, → weak emission-line central star, → weak encounter, → weak equivalence principle, → weak force, → weak gravitational lensing, → weak interaction, → weak lensing, → weak nuclear force, → weak wind problem, → weak-line T Tauri star, → weak-wind O-type star.

Etymology (EN): From O.N. veikr “weak,” cognate with O.E. wac “weak, pliant, soft,” from P.Gmc. *waikwaz “yield,” *wikanan “bend” (cf. Du. week “weak, soft, tender,” O.H.G. weih “yielding, soft,” Ger. weich “soft,” from PIE base *weik- “to bend, wind”

Etymology (PE): Nezâr “weak, feeble, thin, slim; flesh without fat” (bâde-ye nezâr “a wine with minute alcohol,” soxan-e nezâr “inconsistent, weak statement”), variant zâr, Mid.Pers. nizâr (prefixed *ni- + *zâr/*zar) “weak, feeble,” Mid./Mod.Pers. zarmân “old man, deterioration,” Av. zairina- “exhausting, slackening,” zaurura- “weak through old age, decrepit,” cf. Skt. jára- “wearing out, exhaustion,” jaranā- “old, decayed,” jarimán- “weakness through old age,” Gk. geron “old man,” L. granum “grain;” PIE base *ger- “wear away.”
Tâm, → faint.
Sost, from Mid.Pers. sust “weak, lazy.”
Kamnur, from kam “little, few; deficient, wanting; scarce”
(Mid.Pers. kam “little, small, few,” O.Pers./Av. kamna- “small, few”)

• nur, → light.
  Kamzur, from ham + zur, → strength.