early 13c., "joyful, merry," from lust + -y (2). It largely has escaped the Christianization and denigration of its root word. The sense of "full of healthy vigor" is from late 14c.; that of "full of desire" is attested from c. 1400. Related: Lustily; lustiness.
例文
1. a lusty young man
たくましい若者
2.Besides,she was young and lusty and would defend herself.
まして、彼女は若くて力が強いので、自衛するに違いない。
3.He has a strong and lusty son.
彼には丈夫で精力的な息子がいる。
4.They were all lusty ,weather-beaten fellows,hard of hand,bold of eyes.