INFIRM
Meaning of INFIRM in English
adjective
Synonyms: weak 1, decrepit, feeble, flimsy, fragile, frail, unsound, unsubstantial, ||wanky, weakly
Antonyms: hale
Merriam Webster.
Collegiate thesaurus English vocabulary.
Английский энциклопедический словарь тезаурус.
2003