一いっ敗ぱい

い

っ

ぱ

い

一敗する · noun or participle which takes 'suru'

Meanings

one defeat; a single loss

Used for counting losses in sports, games, or competitions. Often appears in phrases like 一敗を喫する (to suffer a defeat) or in win-loss records.

〈相手あいて〉〉に一敗いっぱいを喫きっするto suffer a defeat at the hands of an opponent
決けっ勝しょう戦せんで強きょう豪ごうチームに一いっ敗ぱいを喫きっした。
We suffered a defeat against the powerhouse team in the final.
一いっ敗ぱいもしていないto not have a single loss (undefeated)
今こんシーズンはまだ一いっ敗ぱいもしていない。
We haven't lost a single game this season yet.
〈数すう〉勝しょう一いっ敗ぱいa record of several wins and one loss
今こん場ば所しょは三さん勝しょう一いっ敗ぱいで終おわった。
This tournament ended with a record of three wins and one loss.

敗はい北ぼくN1
敗北 is the general word for defeat of any kind, while 一敗 specifically counts a single loss in a match or series.
敗はい戦せんN1
敗戦 refers to losing a battle, war, or game as an event, whereas 一敗 is used to tally one loss within a win-loss record.

一いっ勝しょう
一勝 means one win, the direct opposite of 一敗's one loss, and the two are often paired as in 一勝一敗.

一いっ杯ぱいN5
一杯 (same pronunciation) means 'a cup/glass' or 'full', while 一敗 means 'one defeat'; context and kanji distinguish them.

Compound of 一 (one) and 敗 (defeat). The reading いっぱい follows regular rendaku voicing of 敗 (はい → ぱい).