1) in exchange for (only construct) (noun masculine) 2) in return for (preposition) Part of Speech: see above in Definition A Related Word by BDB/Strong’s Number: from H2498 Same Word by TWOT Number: 666a
Brown-Driver-Briggs
I. חֵ֫לֶףnoun [masculine]exchange, only construct, as preposition in return for (so הֲלַף, , common in Aramaic e.g. Genesis 4:23ᵑ7ᵑ6 for Hebrew תַּחַת) — עֲבֹדָתָם׳ח (עֲבֹדַתְכֶם) Numbers 18:21,31 (both P).
Numbers 18:21 HEB:בְּיִשְׂרָאֵ֖ל לְנַחֲלָ֑ה חֵ֤לֶף עֲבֹֽדָתָם֙ אֲשֶׁר־ NAS: for an inheritance, in return for their service KJV: for an inheritance, for their service INT: Israel an inheritance return their service which
Numbers 18:31 HEB:הוּא֙ לָכֶ֔ם חֵ֥לֶף עֲבֹֽדַתְכֶ֖ם בְּאֹ֥הֶל NAS: for it is your compensation in return for your service KJV: for it [is] your reward for your service INT: is your compensation he return your service the tent