friendly
adj.behaving in a kind and pleasant way toward others. You use this to describe someone who is easy to talk to and acts like a friend.
adj.behaving in a kind and pleasant way; showing or expressing goodwill and amity.
“The staff at the hotel are very friendly.”
“She gave me a friendly smile and offered to help me find my way to the station.”
“Despite the competitive nature of the industry, the two rival CEOs maintained a friendly relationship, often meeting for lunch to discuss shared challenges.”
Commonly followed by the preposition 'to' or 'with' when describing relationships.
Friendly is an adjective, not an adverb; it cannot modify a verb directly despite ending in -ly.
Usage friendly win
From Middle English frendly, freendly, frendely, frendlich, from Old English frēondlīċ, from Proto-Germanic *frijōndlīkaz, equivalent to friend + -ly. Cognate with Saterland Frisian früntelk, fjuntelk (“friendly”), West Frisian freonlik (“friendly”), Dutch vriendelijk (“friendly”), German Low German fründelk, frünnelk (“friendly”), German freundlich (“friendly”). Doublet of friendlike.
From Middle English frendly, frendliche, from Old English frēondlīċe (“in a friendly manner”), equivalent to friend + -ly.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.