Same word as obsequious:

abject, beggarly, brownnosing, complacent, compliable, compliant, cringing, crouching, deferential, enslaved, fawning, flattering, ingratiating, kowtowing, menial, obeisant, oily, parasitic, parasitical, prostrate, respectful, servile, slavish, sneaking, sniveling, spineless, stipendiary, subject, submissive, subordinate, subservient, sycophantic, toadying, unctuous