IPA: /ˈsleɪvɪʃli/
KK: /ˈsleɪvɪʃli/
In a way that shows excessive willingness to serve or please someone, often without independent thought or creativity.
He followed the rules slavishly, without questioning their fairness.
Slavishly → It is formed from "slave" (from Old French *esclave*, meaning a person who is owned by another) and the suffix "-ly" (meaning in the manner of). The word "slavishly" means in a manner that resembles or is characteristic of a slave, often implying excessive obedience or servility.
Think of someone acting 'in the manner of' a 'slave' — that's why 'slavishly' means behaving with excessive obedience.