Servile (adjective)

1. Having or showing an excessive willingness to serve or please others, often at the cost of one's own dignity or integrity.
2. Slavishly submissive or obsequious.

Origin:

Late 15th century: from latin servilis, from servus 'slave', from servire 'to serve'.

Examples:

1. She was frustrated with her employees who acted in a servile manner.
2. The servant's servile attitude towards his master made him a laughingstock among the other servants.
3. It is not uncommon to see people act in a servile way to those in power.
4. The dog's servile demeanor showed how obedient it was to its owner.
5. The underling's servile approach did not win her any favors with her boss.