The Hittite word ḫa-aš-ša-a-
Word ḫa-aš-ša-a-
IPA ḫāššā
Meaning fireplace, hearth
See also C. Luwian: ḫa-aš-ša-ni-it-ti-iš ‘hearth’

Other words that might be of interest
pa-aḫ-ḫur ‘fire’, ua-ar-ša ‘fog, mist’, gur-ta-an ‘town, citadel, acropolis’, a-aš-kán ‘gate’, ša-mi- ‘smoke’, ḫa-a-aš ‘ashes, dust, soap’, da-an-ku-iš ‘black, dark’, ḫar-ki-iš ‘white, bright’, tak-šu-ul ‘agreement, settlement, peace-treaty’, tuḫ-ḫu-iš ‘smoke, vapor’