内野|ないやnaiya[0]heiban (flat)

1. noun, baseballinfield; diamond

• SynonymインフィールドNeutralA loanword for the infield, rarely used in everyday speech; 「内野」 is the usual term.
• RelatedダイヤモンドNeutralIn baseball, the square formed by the four bases; also the gemstone. 「内野」 covers this area, the defensive zone around it, and the infield stands.
• Antonym外野がいやNeutralThe outfield behind the infield; figuratively, an outsider. The direct opposite of 「内野」.

For the baseball infield, say 「内野」; the square formed by the four bases can also be called 「ダイヤモンド」. For the outfield use 「外野」, which colloquially also means a mere onlooker.

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

1. （野球やきゅう、ソフトボール）本塁ほんるい、一塁いちるい、二塁にるい、三塁さんるいを結むすんだ内側うちがわ。