lacks

v. be short of; be without, be missing; need, want

n. need, want; shortage; absence

Noun
1. the state of needing something that is absent or unavailable; "there is a serious lack of insight into the problem"; "water is the critical deficiency in desert regions"; "for want of a nail the shoe was lost"
(synonym) deficiency, want
(hypernym) need, demand
(hyponym) absence
(derivation) miss
Verb
1. be without; "This soup lacks salt"; "There is something missing in my jewellery box!"
(synonym) miss
(hyponym) want
(derivation) deficiency, want

n. lac, lacquer, varnish, glaze, enamel

zui3 shang4 mei2 mao2, ban4 shi4 bu4 lao2
If he has no hair above the mouth, he is not trustworthy to handle affairs.
A man too young to grow a beard is not dependable. Alternative form: 嘴上无毛，办事不牢 (zui3 shang4 wu2 mao2, ban4 shi4 bu4 lao2).

slack