lacking

verb

1. (form-of, gerund, participle, present)present participle and gerund of lack

noun

1. The absence of something that is desirable or otherwise ought to be present.

   “Cagliostro, however, whatever his moral lackings, did not lack spirit; he was not the man to succumb to this kind of coercion.”

adj

1. Missing or not having enough of (a good quality, etc).

   “This cheese is lacking in pungency.”

   “The team was lacking in stamina and lost the match decidedly.”

   “A few of the pieces of this jigsaw puzzle are lacking.”