yếm
noun

a yem, a Vietnamese bodice based on the Chinese dudou.
(by extension) a garment that looks similar and that is worn in a similar fashion, such as a bib or a dudou
(by extension, of a crab, turtle or tortoise) the bottom side of a shell, such as a plastron
(by extension, of a bovine) a dewlap

yến
noun

a swift (bird)
(loosely) Synonym of én (“swallow”) (bird)
(archaic) a banquet
a unit of weight, equal to 10 kilograms

yến sào
noun

an edible bird's nest

yết hầu

yết hầu
noun

pharynx

yếu
adj

weak, feeble

yếu bóng vía

yếu bóng vía
adj

susceptible to sleep paralysis (bóng đè)
being a scaredy-cat; chicken

yếu chỉ

yếu chỉ
noun

main idea, essentials

yếu kém
adj

weak; deficient

noun

weakness; shortcoming

yếu tố
noun

factor, element

yếu điểm

yếu điểm
noun

(military) an area critical to a military organization

yếu đuối

yếu đuối
adj

weak; frail; weak-willed; feeble

yếu ớt
adj

feeble; weak; frail

adv

feebly; weakly; frailly