familiarly
/fəˈmɪl.jɚ.li/ adverb
- adverb In a casual or informal manner, as with a close acquaintance; especially when such behavior may be considered inappropriate. “He spoke familiarly to the hotel porter.”
- adverb (dated) In an inappropriately sexual or romantic manner.
- adverb In a manner prompting recognition or recollection. “The voice from downstairs sounded familiarly like a foghorn, and right away he knew that Uncle Fred had arrived.”
- adverb In a manner expressing comprehensive or intimate knowledge. “The instructor spoke familiarly about the dangerous conditions on the mountain during the winter.”
Etymology
From Middle English familierly, equivalent to familiar + -ly.
Webster’s 1913
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “familiarly”, CC BY-SA 4.0. Details