This is the 1969th most frequent Japanese word.
だこ
"だこ" means "callus," typically formed on the skin due to repeated friction or pressure.
In this sentence, 'だこ' refers to a callus formed due to friction or pressure, likely caused by activities on the beach.
海辺で遊んだら、だこになった。
After playing by the seaside, I got a foot callus.
Here, 'だこ' metaphorically implies a focus or craze as a figurative expression, though this usage is less common.
新しいゲームが人気だこを巻き起こしている。
The new game is causing a surge in popularity.
'だこ', symbolizing toughness or resistance, is used metaphorically to describe the person's stubbornness.