From halal (in the sense of rejoicing); a celebration of thanksgiving for harvest -- merry, praise.
see HEBREW halal
H1974. hillul
[הִלּוּל] noun [masculine] (Late Hebrew id.) only plural הִלּוּלִים rejoicing, praise:
1 הִלּוּלִים וִיַּעֲשׂוּ Judges 9:27 i.e. a vintage-rejoicing, merry-making, connected with thanksgiving אֱלֹהֵיהֶם בֵּית וַיָּבאֹוּ etc. (i.e. god baal-Berith, see 9:4).
2 of praise to ה ׳פקדֶשׁ ׳י, Leviticus 19:24 (H) holiness of praise, i.e. a consecrated thing in token of thanksgiving for fruit, offered in 4th year (compare Late Hebrew).