frail
https://gyazo.com/89c52fedc6ece13a6c978643f6bbb365
WEAK applies to deficiency or inferiority in strength or power of any sort. e.g. felt weak after the surgery
FEEBLE suggests extreme weakness inviting pity or contempt. e.g. a feeble attempt to walk
e.g. a frail teenager unable to enjoy sports
FRAGILE suggests frailty and brittleness unable to resist rough usage. e.g. a reclusive poet too fragile for the rigors of this world
INFIRM suggests instability, unsoundness, and insecurity due to old age or crippling illness. e.g. infirm residents requiring constant care
DECREPIT implies being worn-out or broken-down from long use or old age. e.g. the dowager's decrepit retainers
adjective
〈人が〉(老齢・病気などで)か弱い(weak), やせ衰えた, きゃしゃな e.g. she looked frail and vulnerable
e.g. a frail voice.
e.g. the balcony is frail
e.g. the frail Russian economy.
はかない, つかの間の; 意志が弱い, 誘惑に勝てない
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ORIGIN