speak resentfully
喞 centers on speaking with resentment or complaint, expressing dissatisfaction through words.
喞 combines 口 (mouth) with 卽, which likely contributes the sound. The exact historical development of the right-side component is uncertain.
The mouth radical 口 beside the complex right side suggests words being forced out under pressure, like resentful speech escaping through a narrow opening.
For ショク, imagine someone speaking resentfully while choking on their words: the choked sound 'shock' cues ショク, and the mouth 口 is right there.
pump