obsequious→/?b?sikwi?s / too eager to praise or obey someone.

ob詞根→toward：obtain,observe

sequ詞根→follow：sequence

(/?si?.kw?ns/ 順序、一系列、同花順)，sequel(/?si?kw?l / 續(xù)集)

詞根結(jié)合即【跟在身后】

suck up to→to try to make someone in authority approve of you by doing and saying things that will please them.

flatter→to praise someone in order to make them feel attractive or important, sometimes in a way that is not sincere.

obsequious比flatter更卑微一點，