←
English plain (mention)
←
English llano (doublet)
←
Middle English plane (derived)
←
Middle English plaine (mention)
←
Middle English plane (inherited)
←
Old French plane (derived)
←
Ancient Greek πλατύς (mention)
←
Proto-Indo-European *pleh₂- (root)
→
Japanese プレーン (borrowed)
→
Japanese プレイン (borrowed)