assainir bedeutet auf Englisch

sanitize [sanitized, sanitizing, sanitizes]▼◼◼◼(to free from microorganisms)
verb
[UK: ˈsæ.nə.ˌtaɪz] [US: ˈsæ.nə.ˌtaɪz]

heal [healed, healing, heals]▼◼◼◻(make better)
verb
[UK: hiːl] [US: ˈhiːl]