INFIRMING
Scrabble letter values: I1N1F4I1R1M3I1N1G2 = 15
Definition
INFIRMING is the present participle of INFIRM.
adjective INFIRM: lacking bodily or muscular strength or vitality.
Synonyms of INFIRM: decrepit, debile, feeble, rickety, sapless, weak, weakly