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small; narrow
familiar prefix
slightly; a bit
「小」 has other readings with different meanings.
小声で話してもらえますか聞こえにくい。
Could I get you to speak in a lower voice? It's hard to hear.
小石を拾って投げていた子供たち。
Children who were picking up and throwing pebbles.
小川のそばに座って休憩したよ。
I sat and rested by the small stream.