二塁・２塁|にるいnirui[1]atamadaka (head-high)

1. noun, baseballsecond base

• SynonymセカンドベースNeutralLoanword for the base bag itself; examples are scarce, and in everyday speech 「二塁」 is the usual word.
• RelatedセカンドNeutralColloquial loanword for second base or the second baseman; it can also mean second in order or second gear.
• RelatedキーストーンNeutralLoanword for the second baseman–shortstop pairing; mainly a term of commentary.

For baseball's second base or second baseman, use 「二塁」, as in 「二塁手」 and 「二塁打」; 「セカンド」 is the common colloquial choice, while 「キーストーン」 refers to the second–shortstop duo.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 三みっつあるベースの中なかで二に番目ばんめに打者だしゃが踏ふむ場所ばしょ。
2. 二塁手にるいしゅ。