Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
heartrending is an adjective meaning "causing or marked by grief or anguish". It carries one recorded sense.
causing or marked by grief or anguish
“a grievous loss”
“a grievous cry”
“her sigh was heartbreaking”
“the heartrending words of Rabin's granddaughter”
Definitions, synonyms and semantic relations for heartrending come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.