Word parts heart + -less Pronunciation (US) IPA (key): /ˈhɑrt.lɪs/ (UK) IPA (key): /ˈhɑːt.lɪs/ Audio (US)(file) Hyphenation: heart‧less Adjective Positive heartless Comparative more heartless Superlative most heartless If something is heartless, it does not have a physical heart. If a person is heartless, they do not care or show concern for others.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads