dear

nouns

a beloved person; used as terms of endearment
a sweet innocent mild-mannered person (especially a child)

adjectives

dearly loved
with or in a close or intimate relationship
"a good friend"; "my sisters and brothers are near and dear"
earnest
"one's dearest wish"; "devout wishes for their success"; "heartfelt condolences"
having a high price
"costly jewelry"; "high-priced merchandise"; "much too dear for my pocketbook"; "a pricey restaurant"
is derived from

adverbs

with affection
"she loved him dearly"; "he treats her affectionately"
at a great cost
"he paid dearly for the food"; "this cost him dear"