red lacquer bow
弴 refers specifically to a bow coated with red lacquer, a decorative and protective finish. The meaning is narrow and concrete, centered on this particular type of bow.
弴 combines 弓 (bow) with 享, which likely contributes the sound. The character is rare and its exact historical development is uncertain.
The left side is a bow 弓, and the right side 享 looks like a container or offering. Imagine a bow being dipped into a vat of red lacquer, emerging richly coated.
For トン, picture a ton of red lacquer being poured over the bow: ton -> トン, and the bow gets its glossy red finish.
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