From an unused root meaning to hold together; a cup (as a container), often figuratively, a lot (as if a potion); also some unclean bird, probably an owl (perhaps from the cup-like cavity of its eye) -- cup, (small) owl. Compare kiyc.
see HEBREW kiyc
I. כּוֺס noun feminineLamentations 4:21 cup (√ unknown; perhaps kindred with כִּיס, q. v.; Late Hebrew id.; Phoenician כסת; Aramaic כָּס, ; Arabic is Aramaic loan-word according to Frä171, but see DHMVOJ i. 27) — ׳כ absolute Genesis 40:11 +; כּ֯יֹס Proverbs 23:31; construct Genesis 40:11 +; suffix כּוֺסִי Psalm 16:5; 23:5 etc.; plural absolute כֹּסוֺת Jeremiah 35:5; — cup 2 Samuel 12:3; for wine Genesis 40:11 (3 t. in verse); 40:13, 21 (all E), Proverbs 23:31; Jeremiah 35:5; שְׂפַתאכּוֺס 1 Kings 7:26; 2 Chronicles 4:5; ׳כ תַּנְחוּמִים Jeremiah 16:7 the cup offered to mourners; figurative (wine-) cup of judgement of ׳י, from which the nations, or Israel, must drink 49:12; Lamentations 4:21; Psalm 75:9; ׳כ חֲמָתוֺ Isaiah 51:17, 22; הַחֵמָה ׳כ הַיַּיִן Jeremiah 25:15, compare 25:17; 25:28; ׳כ הַתַּרְעֵלָה Isaiah 51:17, 22; וּשְׁמָמָה שַׁמָּה ׳כ Ezekiel 23:33, compare 23:31; 23:32; 23:33; ׳כ י ׳יְמִין Habakkuk 2:16; by bold metaphor Babylon is such a cup י ׳בְּיַד ׳כ זָהָב Jeremiah 51:7; so of wicked persons, fire, brimstone, and burning wind are מְנָתאכּוֺסָם Psalm 11:6 the portion of their cup; ׳כ in good sense, cup of blessing 23:5 (overflowing); ׳י וְכוֺסִי חֶלְקִי מְנָת 16:5; ׳כ יְשׁוּעוֺת 116:13.
II. כּוֺס noun [masculine] a kind of owl (according to Vrss.; see Kn-Di Leviticus 11:17; word perhaps onomatopoetic) — unclean bird 11:17; Deuteronomy 14:16, dwelling in ruins ׳כִ חֳרָבוֺת Psalm 102:7.
I. כור (√ of following; perhaps be or make round, hence furnace, pot, basin, from shape; Arabic wind about (e.g. a turban), turn or twist (of turban), blacksmith's fire-place, hornet's or bees' nest, ** means also a camel's saddle (or 'howdah') with its apparatus, see Frey, Lane; bundle; > Thes compare Syriac incaluit (Lexicons aestuavit, calefactus est)).