English biennial

← English -al (mention)

← English bi (confix)

← English ennial (confix)

← Latin biennium (borrowed)

← Latin bis (mention)

← Latin bi- (mention)

← Latin annus (mention)

→ English year (link)

→ English sesquiennial (mention)

→ English biennially (suffix)

→ English bienniality (suffix)