Or niychoach {nee-kho'-akh}; from nuwach; properly, restful, i.e. Pleasant; abstractly, delight -- sweet (odour).
see HEBREW nuwach
H5207. nichoach
נִיחֹחַ and (Leviticus 1:9) נִיחוֺחַ43
noun [masculine] a quieting, soothing, tranquillizing (compare I. נַחַת Job 36:16) (ניחח ריח also Ecclus 45:16c; on formative see 0l§ 187 b) Sta§ 233 BaNB § 142 Köii. 1, 151. 489, where, after PhilippiBas ii. 362, יִ֯ explanation as dissimilation from וֺ); — absolute ׳נ Genesis 8:21 +; suffix נִיחֹתִי Numbers 28:2, נִיחֹחֲכֶם Leviticus 26:31, נִיחוֺחֵיהֶם Ezekiel 20:28; — a soothing, tranquillizing, only in phrase נ ׳רֵיח = soothing, tranquillizing odour of sacrifices acceptable to ׳י Genesis 8:21 (J), Exodus 29:18, 25, 41; Leviticus 1:9, 13, 17 32t. P. Ezekiel 20:41; of sacrifice to idols 6:13; 16:19; 20:28.