Antonym: kind. Similar words: debunking, mankind, humankind, banking, ranking, franking, to my way of thinking, blind drunk. Meaning: adj. 1. lacking kindness 2. deficient in humane and kindly feelings.
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(1) She was very hurt by his unkind words.
(2) It was unkind to denigrate her achievement.
(3) He was never unkind to her.
(4) She was rather hurt by his unkind words.
(5) Unkindness often reacts on the unkind person.
(6) A lot of unkind things were said.
(7) What you said was true but nevertheless unkind.
(8) She never said anything unkind about anyone.
(9) He was never actually unkind to them.
(10) It would be unkind to go without him.
(11) All last summer he'd been unkind to her.
(12) Such unkind action debases you.
(13) It's unkind to exult over a person one has beaten in a race.
(14) Sometimes she seems a very impersonal, even unkind, mother.
(15) A right easterly wind is very unkind.
(16) Fancy her saying such unkind things about you!
(17) Don't be so unkind to your brother.
(18) She was still smarting from his unkind words.
(19) That was an unkind thing to say.
(20) It's unkind to sport with others' feelings.
(21) Ooh(sentencedict.com/unkind.html), that's a bit unkind!
(22) She was the butt of some very unkind jokes.
(23) Unkind remarks are one of his specialities.
(24) She burned with fury at his unkind remarks.
(25) Such unkind remark was not called for.
(26) It's not in his nature to be unkind.
(27) Marcus has been most unkind to me today.
(28) Her unkind remark bruised his feeling.
(29) When I lent I had a friend; when I asked he was unkind. 
(30) Don't jeer at the person who came last in the race - it's very unkind.
More similar words: debunking, mankind, humankind, banking, ranking, franking, to my way of thinking, blind drunk, sinking feeling, kind, kindle, kind of, kindly, kindred, kindled, kindness, skin disease, kindergarten, painkiller, junk, dunk, funk, unknown, flunk, chunk, skunk, trunk, slunk, debunk, sunken.