noun
defense; protection; prevention
Refers to the act of guarding against or stopping something undesirable. Often used in compounds like 防ぎ止める (to hold off) or 防ぎ手 (a defender).
敵の攻撃を防ぎきれなかった。
We couldn't completely defend against the enemy's attack.
病気の防ぎに手洗いが大切だ。
Handwashing is important for the prevention of illness.
Noun form of the verb 防ぐ (ふせぐ, to defend/protect), derived from the continuative stem (連用形). The kanji 防 is used for defense; variant kanji 禦 and 拒 are rare and carry specific nuances.