absence, lack, shortage, shortcoming, deficiency, defect, flaw, gap, want {zn.} manque [m] (le ~)
défaut [m] (le ~)
vice [m] (le ~)
privation [v] (la ~)
insuffisance [v] (l' ~)
I lack confidence.
Je manque de confiance.
She died for lack of air.
Elle mourut par manque d'air.