regret

vt.后悔；遗憾 vi.感到懊悔 n.懊悔

regional, regionalization, regionalize, regionally, register, register office, registered, registered nurse, registered post, registered trade mark, registrar, registration, registration number, registry, registry office (also `register office), Regius professor, regnant (often 常作 Regnant), regress, regression, regressive, regretful, regretfully, regrettable, regrettably, regroup, regrow, Regt, regular, regularity, regularization, regularisation, regularize, regularize, regularise, regularly, regulate, regulation, regulator, regulatory, regurgitate, regurgitation, rehabilitate,