Domanassa: lit. 'sad-mindedness', grief, i.e. mentally painful feeling cetasika-vedanā is one of the 5 feelings vedanā and one of the 22 abilities indriya. According to the Abhidhamma, grief is always associated with antipathy and grudge, and therefore kammically disadvantageous akusala .
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.