IPA: /ˈlɪkˌspɪtəl/
KK: /ˈlɪkˌspɪtəl/
A person who flatters or ingratiates themselves with someone in power, often to gain favor or advantage.
He was known as a lickspittle, always trying to please the boss with excessive praise.
Lickspittle is formed from "lick" (meaning to pass the tongue over) and "spittle" (meaning saliva). The word describes someone who flatters or ingratiates themselves, akin to a person who metaphorically licks the spittle of another to gain favor.
Think of someone who 'licks' to show servitude or flattery, and 'spittle' refers to saliva, which helps you remember that a lickspittle is someone who flatters excessively.
No commonly confused words.