lacking

adj. missing, absent, without

prep. without, needing, wanting, deficient in

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

Adjective
1. not existing; "innovation has been sadly lacking"; "character development is missing from the book"
(synonym) lacking(p), missing, nonexistent, wanting(a)
(similar) absent
2. inadequate in amount or degree; "a deficient education"; "deficient in common sense"; "lacking in stamina"; "tested and found wanting"
(synonym) deficient, lacking(p), wanting(p)
(similar) inadequate

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

(p. pr. & vb. n.)
of Lack
  

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).

cha4 qiang2 ren2 yi4
Lacking a strong person to suggest.
Barely satisfactory. Said of someone or something which is good enough to fulfill a need.

Synonyms and related words:
absconded, absent, adulterated, arrested, away, bankrupt in, bare of, bereaved, bereaved of, bereft, bereft of, blemished, callow, cut off, damaged, defective, deficient, deleted, denuded, denuded of, departed, deprived of, destitute of, devoid, devoid of, disappeared, divested, embryonic, empty of, erroneous, existless, failing, fallible, faulty, for want of, forlorn of, found wanting, gone, half-assed, hypoplastic, immature, impaired, imperfect, imprecise, impure, in arrear, in arrears, in default, in default of, in short supply, in want of, inaccurate, inadequate, incompetent, incomplete, inexact, infant, inferior, insufficient, makeshift, mediocre, minus, missing, mixed, needing, negative, no longer present, nonattendant, nonexistent, not enough, not found, not perfect, not present, null, off, omitted, out of, out of pocket, out of sight, part, parted from, partial, patchy, robbed of, sans, scant, scant of, scanty, scrappy, shorn of, short, short of, shy, shy of, sketchy, stripped of, subtracted, taken away, too little, unblessed with, underdeveloped, undeveloped, unequal to, uneven, unexisting, unfinished, unperfected, unpossessed of, unqualified, unreached, unsatisfactory, unsatisfying, unsound, unsufficing, unthorough, vacuous, vanished, void, void of, wanting, without being