Feminine of chet'; an offence, or a sacrifice for it -- sin (offering).
see HEBREW chet'
חֲטָאָה noun feminine sin, sin-offering (?) —
1 sin, chiefly in the phrase ׳ח גְדֹלָה great sin Genesis 20:9 (E) Exodus 32:21, 30, 31 (JE), 2 Kings 17:21; ח ׳כְּסוּי Psalm 32:1 he whose sin is covered is blessed; but the prayer of the wicked becomes sin when he is judged 109:7.
2 sin-offering (according to most) וחטאה עולה Psalm 40:7 whole burnt-offering and sin-offering (so Vrss Thes MV SS and others, but < whole burnt-offering with sin see Br MP 329).