hate
堲 centers on intense dislike or hatred. The given meaning is narrow, and the kanji is rare, so its usage is limited to expressing hate.
堲 combines 即 (immediate, instant) with 土 (earth). The exact historical development is uncertain, and the modern form may not directly reflect the original meaning of hate.
The top 即 suggests something immediate, and the bottom 土 is earth. Picture an immediate, visceral hatred rising from the ground like a sudden eruption of anger.
For シツ, imagine a person hissing 'Shh! It's hateful!' when they see something they despise: the hissing sound 'Shh' cues シツ, and the feeling is immediate hatred.