手一杯

プログレッシブ和英中辞典(第4版)

ていっぱい【手一杯】

彼女は赤ん坊の世話で手一杯だ
She 「has her hands full [is busy enough just] taking care of her baby.

彼は目下論文の校正で手一杯だ
He is now fully occupied with the proofreading of his thesis.

彼は手一杯に事業を広げた
He extended his business 「to the full [to the limit of his means].

出典　小学館「プログレッシブ和英中辞典(第4版)」