familiar
noun
a person attached to the household of a high official (as a pope or bishop) who renders service in return for support
a friend who is frequently in the company of another
“drinking companions”
“comrades in arms”
a spirit (usually in animal form) that acts as an assistant to a witch or wizard
Synonymsfamiliar spirit
adjective
well known or easily recognized
“a familiar figure”
“familiar songs”
Oppositesunfamiliarwithin normal everyday experience; common and ordinary; not strange
“familiar ordinary objects found in every home”
“a familiar everyday scene”
Oppositesstrange(usually followed by `with') well informed about or knowing thoroughly
“conversant with business trends”
“familiar with the complex machinery”
Synonymsconversanthaving mutual interests or affections; of established friendship
“on familiar terms”
“pretending she is on an intimate footing with those she slanders”
Synonymsintimate
Source: WordNet 3.1, Princeton University