vassalage

n [U]: reduce a dukedom to vassalage 将一公爵降为封臣.

variation, variations, varied, variegate, variegated, variegation, variety, variety show, variety store, various, variously, varnish, varsity, vary, varying, vascular, vase, vasectomy, Vaseline, vassal, vast, vastly, vastness, vat, VAT (also Vat), Vatican, vaudeville, vault, vaulted, vaulter, vaulting horse, vaunt, vauntingly, VC, VCR, VD, VDU, veal, vector, veer,