サブsabu

1. nounsub; substitute; reserve; backup
2. prefixsub-

• Synonym補欠ほけつNeutralFills a vacancy or serves as an alternate, as in 「補欠合格」; its scope is broader than sports, while 「サブ」 is the casual choice.
• Synonym控えひかえNeutralA backup or spare kept ready, also a memo or copy; a versatile noun, while 「サブ」 is the casual loanword for subs and backups.
• Synonym控え選手ひかえせんしゅNeutralA player on standby to enter the game; the nuance is waiting in reserve, while 「サブ」 is broader and more casual.
• Related補欠選手ほけつせんしゅNeutralA substitute player; leans formal in sports. 「サブ」 is the casual everyday word and also covers deputies and backups, not just players.
• AntonymメインNeutralA loanword meaning the main thing, the direct opposite of 「サブ」, as in 「メインとサブ」.

Use 「サブ」 for a deputy, substitute or backup, as in 「サブリーダー」「サブ機」. For sports substitutes pick 「補欠」 or 「控え選手」, and for backups 「控え」. For the main one, use 「メイン」.

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

1. 補欠ほけつ。
2. 副ふくの。予備よびの。
3. 下した、下位かい、やや。