to be delighted, to dislike, to have no need for
忔 has no clear single conceptual center; its given meanings are contradictory: delight, dislike, and having no need for something. This rare kanji likely represents a complex or obsolete emotional state, and its standalone meaning is uncertain.
忔 combines the heart radical 忄 with 乞, which may have contributed a phonetic element. The exact historical development and original meaning are uncertain.
The heart radical 忄 beside 乞 (beg) could suggest a heart begging for something, but the meanings are mixed: delight, dislike, and no need. Imagine a heart that begs for something, then feels delight when it gets it, dislike when it doesn't, and eventually decides it has no need for it.
For キツ, imagine a heart that begs so intensely it gets kits (kits -> キツ) of mixed emotions: delight, dislike, and indifference all packed together.