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uncle
old man; mister
manybar goatfish (Parupeneus multifasciatus)
近所の小父さんに声をかけられた。
I was called by the neighborhood uncle.
魚屋の小父さんはいつも元気がいいね。
The man at the fish shop is energetic.
小父さんが親切に道を教えてくれた。
The uncle told me the way.