read aloud, recite, chant, droop
嚲 centers on vocal expression: reading aloud, reciting, or chanting. The droop sense is a separate, less common meaning that may relate to a hanging or lowering action, but it does not clearly connect to the vocal cluster.
嚲 is a rare character whose historical development is uncertain. The modern form visually combines 享 and 單, but the original semantic and phonetic roles of these components are not clearly established.
The left side 享 can suggest offering or receiving, and the right side 單 can suggest a single or simple thing. Imagine a single person offering a recitation or chant aloud, their voice rising and then drooping at the end.
For タ, picture a person chanting 'ta-ta-ta' in rhythm, their voice drooping on the last 'ta': ta -> タ.