From an unused root apparently meaning to glide swiftly; life (as a fleeting portion of time); hence, the world (as transient) -- age, short time, world.
H2465. cheled
חֶ֫לֶד noun [masculine]Job 11:17 duration, world (= αιὤν) (Arabic perpetual duration, eternity) — absolute ׳ח Psalm 17:14; חָ֑לֶד Job 11:17 2t. + Isaiah 38:11 Che De, followed by Manuscript Babylonian etc. (Baer חָ֑דֶל); suffix חֶלְדִּי Psalm 39:6; = duration of life Job 11:17; Psalm 39:6 ("" יָמַי), מֶהחָֿ֑לֶד אֲנִי זְכֹר 89:48 of what duration I am Dr§ 189. 2, or (אדני for אני) what is life (?) Hi Ew Now and others; world (= αιὤν, not Κόσμος) 17:14; 49:2 (ח ׳ישׁבי "" כלעֿמים), compare Isaiah 38:11 (see above; "" הַחַיִּים אֶרֶץ).
II. חלד (√ of following; compare Late Hebrew חלד dig, or hollow out, Aramaic creep, crawl).