The Proto-Anatolian word *ḱrdios
Word *ḱrdios
Meaning heart, center
See also Proto-Indo-European: *k̂erd- (nom. k̂ēr, acc. k̂érd-m̥ gen. k̂r̥d-ós) ‘heart’
Hittite: ke-er ‘heart, center, core’
Hittite: kar-di- ‘heart, core’
C. Luwian: za-ar-ta ‘heart’
Palaic: ka-a-ar-ti ‘heart’
Avestan: zǝrǝd- ‘heart’
Tocharian B: käryā ‘heart’

Other words that might be of interest
*sḗgwr / sḗgwn ‘urine’, *gēsar ‘hand’, *lālo ‘tongue, speech, talk’, *podo ‘foot’