acts
行為
解説 Definition
acts は act（行為、行動）の複数形です。人が行った複数の行為を表し、よい行いにも悪い行いにも使えます。
Things that people deliberately do, considered as separate actions or deeds. The plural can refer to good or bad behavior and commonly appears in phrases such as acts of kindness, brave acts, or criminal acts.
覚え方のコツ Memory Tip
単数形 act「行為」に複数語尾 -s を付けた形です。語末 /t/ は無声音なので -s は /s/ と発音し、acts は /ækts/ となります。action よりも一つ一つ数えられる具体的な行為を指す点を意識し、acts of kindness、brave acts、criminal acts のように、性質を表す語と組み合わせて覚えましょう。
Acts is the plural of the noun act, meaning a separate deed or thing done by someone. Because act ends in the voiceless sound /t/, the plural -s is pronounced /s/, producing the consonant cluster /ækts/. Think of actions divided into individual countable units: one act of kindness, several acts of kindness. Action can describe activity more generally, while acts often emphasizes particular deeds that can be counted, judged, praised, or criticized. Useful combinations include brave acts, generous acts, and criminal acts.
例文
His acts helped many people.
彼の行為は多くの人を助けました。
Small acts of kindness are important.
小さな親切な行為は大切です。
The teacher praised her brave acts.
先生は彼女の勇敢な行為をほめました。
acts の類義語・関連語
acts の語源・成り立ち Etymology
ラテン語 actus（行うこと）から。語根 agere は「行う・動かす」を意味する。関連語: action（行動）、agent（代理人＝行う者）。agere は印欧祖語 *ag-（動かす）に遡り、「実際に行われた事柄」が「行為・法令」の意味に発展した。
Act comes from Latin actus, “a doing” or “a driving,” based on agere, “to do, drive, or set in motion.” The same root appears in action and agent. The word developed from the general idea of doing something to a particular deed, performance, or formal measure. Acts is the regular plural noun form and, in the examples here, refers specifically to multiple deeds performed by people.
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