knuckle under
verb
Infinitive
knuckle under
Present tense 3rd person singular
knuckles under
Preterite
knuckled under
Present participle
knuckling under
Past participle
knuckled under
verb
knuckle under
knuckles under
knuckled under
knuckling under
knuckled under
verb
verb
verb
verb vt
verb
verb
verb
verb