Bible Greek and Hebrew Dictionaries combined for Word Studies
Genesis Chapter 1
younger 1640 # elasson {el-as'-sone}; or elatton (el-at-tone'}; comparative of the same as 1646; smaller (in size, quantity, age or quality): -- less, under, worse, {younger}.
younger 3117 ## yowm {yome}; from an unused root meaning to be hot; a day (as the warm hours), whether literal (from sunrise to sunset, or from one sunset to the next), or figurative (a space of time defined by an associated term), [often used adverb]: -- age, + always, + chronicals, continually(-ance), daily, ([birth-], each, to) day, (now a, two) days (agone), + elder, X end, + evening, + (for) ever(-lasting, -- more), X full, life, as (so) long as (. . live), (even) now, + old, + outlived, + perpetually, presently, + remaineth, X required, season, X since, space, then, (process of) time, + as at other times, + in trouble, weather, (as) when, (a, the, within a) while (that), X whole (+ age), (full) year(-ly), + {younger}.
youthful 3512 # neoterikos {neh-o-ter'-ik-os}; from the comparative of 3501; appertaining to younger persons, i.e. juvenile: -- {youthful}.