Roots/*ǵerh₂-tó-ǵerh₂-tó-“grown old, aged”Widely acceptedtimeaginggeriatric, gerontologyParticipial of *ǵerh₂- giving Greek gerōn > geriatric, gerontology.Related Rootsbʰew-tó-“that which has grown, become”deh₂-“to divide, share”deh₂-mn̥-₂“a portion of time, division”deh₃-tó-₂“given, granted”dyu-es-“daylight, bright day”dyu-n-“day, daytime period”dʰegʷʰ-“to burn, be warm”dʰeh₁-tú-“established time, appointed date”