Similar words: artless, effortlessly, startle, startled, tactlessness, limitlessness, heart, at heart. Meaning: ['hɑrtlɪs /'hɑːt-] 
adj. 1. lacking in feeling or pity or warmth 2. devoid of courage or enthusiasm.
adj. 1. lacking in feeling or pity or warmth 2. devoid of courage or enthusiasm. 
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(1) Determined to be tired heartless indifference.
(2) Heartless laugh, was the best thing that I have.
(3) I would like to be a single-cell organisms, heartless creature alive.
(4) Police were quick to condemn this heartless theft.
(5) The decision does seem a little heartless.
(6) You couldn't be so heartless as to disown him.
(7) What a heartless thing to say!
(8) I couldn't believe they were so heartless.
(9) How can you be so heartless?
(10) The heartless witch cast a spell on the poor little girl.
(11) He was, she said, a heartless scoundrel who had stripped her of everything she owned.
(12) Don't be so heartless!
(13) Todd's father was cold and heartless.
(14) It is not that I am heartless.
(15) This was not so heartless as it might seem.
(16) Stop pretending to be so heartless.
(17) Sorry if that sounded flippant or heartless - it wasn't meant to be.
(18) You've assigned me the role of heartless villain financier, obsessed with money, wealth, and luxury.
(19) She was a heartless, money-grabbing woman who made her fortune from the misery and desperation of others.
(20) All capitalists are not like the stereotypical tycoons: heartless moguls with cigars, double-breasted suits[sentencedict.com/heartless.html], and limos.
(21) The play tells the story of a fabulously wealthy woman who seeks revenge on her heartless seducer.
(22) His reputation already in jeopardy, Young further offended gentiles with what they thought was his most heartless scheme.
(23) We know that New York is sometimes depicted as a cold and heartless city.
(24) She'd tell him a few home truths about his condescending, heartless, authoritarian attitude.
(25) Last Saturday's exhibition against Hull City, a side with a pitiful away record, was inept and occasionally heartless.
(26) Soon he begins to get angry at the people involved in the incident for being so careless or so heartless.
(27) One night I got stoned and saw exactly what I'd become - a spoiled, heartless little shit.
(28) It would seem cruel to watch clean rivers flowing sweetly through a heartless and divided nation.
(29) People in Acra and Catskill told these stories when the papers said Jack was a heartless killer.
(30) In his autobiography, he portrays his father as cold and heartless.
More similar words: artless, effortlessly, startle, startled, tactlessness, limitlessness, heart, at heart, hearth, hearty, by heart, hearten, heartily, heartwood, heartfelt, hearthrug, lose heart, dishearten, witless, heartening, cold-hearted, tactless, spotless, listless, restless, rootless, heartbroken, heart and soul, wholehearted, take to heart.