servile - Dictionary definition and meaning for word servile
sounds like "SERVE" while serving you have to be submissive, or keep your head down.
servants should be SERVILE else they will be out of their job. servile= to be servable, submissive , patient even when put into humiliation
SERVILE and DOCILE which are rhyming words also have the same meaning. The words refer to someone who is excessively submissive.