touch, feel, hit, proclaim, announce, conflict, contact
觸 centers on physical or metaphorical contact: touching, feeling, hitting, or coming into conflict. The senses of proclaiming or announcing are less common and may be extensions of making contact through speech.
觸 combines 角 (horn) and 蜀, which likely provides the sound. The original idea may involve butting or touching with a horn, extending to contact in general.
A horn (角) makes contact with something, like an insect (虫) under a net (罒) wrapped in a package (勹). The whole scene is about touching and feeling.
For ショク, imagine a shock when a horn unexpectedly touches you: shock -> ショク, and the contact is startling.