treat
//triːt//
Verb
to behave toward or deal with someone in a particular way
She treats everyone with respect.
to give medical care or attention to someone or something
The doctor treated her for a broken arm.
to buy or give something special to someone as a gift or for enjoyment
I'll treat you to dinner tonight.
to apply a process or substance to something to preserve, improve, or change it
The wood was treated with a special oil to protect it from water damage.
to deal with or discuss a subject in writing or speech
The book treats the subject of climate change in detail.
Noun
something special or enjoyable that is given or done for someone, especially as a gift
I bought ice cream as a special treat for the kids.
an act of paying for someone else's food, drink, or entertainment
Dinner is my treat tonight.