A lack of competence.

synonym: inadequacy.

Roget 808: nonpayment; default, defalcation; protest, repudiation; application of the sponge^†; whitewashing.    insolvency, bankruptcy, failure; insufficiency etc. 640; run upon a bank; overdrawn account.    waste paper bonds; dishonored bills, protested bills; bogus check, bogus cheque, rubber check.    bankrupt, insolvent, debtor, lame duck, man of straw, welsher, stag, defaulter, levanter^†.    ... show more

Roget 304: shortcoming, failure; falling short etc. v.; default, defalcation; leeway; labor in vain, no go.    incompleteness etc. 53; imperfection etc. 651; insufficiency etc. 640; noncompletion etc. 730; failure etc. 732.    ... show more

pathology Inability of a bodily part or organ to function normally.

Lack of an adequate quantity or number.

synonyms: deficiency, inadequacy.

Roget 53: incompleteness etc. adj.; deficiency, short measure; shortcoming etc. 304; insufficiency etc. 640; imperfection etc. 651; immaturity etc. (nonpreparation) 674; half measures.    [part wanting] defect, deficit, defalcation, omission; caret; shortage; interval etc. 198; break etc. (discontinuity) 70; noncompletion etc. 730; missing link.    missing piece, missing part, gap, hole, lacuna.    ... show more

Roget 640: insufficiency; inadequacy, inadequateness; incompetence etc. (impotence) 158; deficiency etc. (incompleteness) 53; imperfection etc. 651; shortcoming etc. 304; paucity; stint; scantiness etc. (smallness) 32; none to spare, bare subsistence.    scarcity, dearth; want, need, lack, poverty, exigency; inanition, starvation, famine, drought.    dole, mite, pittance; short allowance, short commons; half rations; banyan day.    emptiness, poorness etc. adj.; depletion, vacancy, flaccidity; ebb tide; low water; a beggarly account of empty boxes" [Romeo and Juliet]; indigence etc. 804; insolvency etc. (nonpayment) 808.    ... show more

Dutch: slapte
Polish: niedostateczność, niewystarczalność