From yowm; daily -- daily, (by, in the) day(-time).
see HEBREW yowm
יוֺמָם51 substantive and
adverb daytime, by day (compare Aramaic יְמָמָא day (as opposed to night); יֵמָם ᵑ7 by day; perhaps Phoenician ימם (in dates, before number), CISI. i. 10. 1 (see note); so NöZDMG 1886, 721: on םָ֯ see below חִנָּם) —
1. substantive daytime (rare) Jeremiah 15:9 יומם בעוד while it is yet daytime, 33:20 b ולילה יומם הֱיוֺת לְבִלְתִּי daytime and night, 33:25 י ׳בְּרִיתִי ולילה (? read יוֺם as 33:20 a); Ezekiel 30:16 יוֺמָם צָרֵי foes of daytime, i.e. coming by day (compare Jeremiah 15:8; but text apparently defective, see ᵐ5 Sm); once (late) בְּיוֺמָם (compare בְּיֵמָם ᵑ7 1 Samuel 25:16; Job 5:14), Nehemiah 9:19 (varied from Exodus 13:21; Deuteronomy 1:33 יומם). — Numbers 9:21 the sense required is (during) a day and a night; read probably יוֺם
2. adverb in the daytime, by day, Numbers 10:34; Job 24:16 (but see חִתֵּם), Isaiah 4:6; Ezekiel 12:3-4, 7; mostly with לַיְלָה, and then often in poetry = continually: so וָלַיְלָה יוֺמָם Exodus 13:21; Joshua 1:8; 1 Kings 8:59; Psalm 1:2; 32:4 +, וְיוֺמָם לַיְלָה Deuteronomy 28:66; Isaiah 34:10; Jeremiah 14:17, in parallel clauses (especially in poetry) 2 Samuel 21:10; Isaiah 21:8; Jeremiah 31:35; Psalm 22:3; 42:9; 91:5; 121:6 +. 13:3 by day yields a lame sense: either add וָלַיְלָה (ᵐ5 Del Gr Ch), or read יֹם יֹם יוֺם) (יוֺם LagNov.Psalt.Gr.Ed.Spec.13 Now.
I. יון (√ of following; meaning unknown).