Cicada character

It names a cicada; “insect” is the broader dictionary gloss.

說文解字, an early Chinese character dictionary, parses 蛁 as 虫 for the meaning and 召 for the sound.

A Han-era example appears in Yang Xiong’s 太玄經, in a line about a cicada calling; 蛁蟟 and 蛁蟧 are compound names for a particular cicada, not definitions of 蛁 alone.

What if someone sent 蛁 alone?

Its reading does not reveal the sender’s reason.

蛁 names a cicada, but that alone cannot explain why someone chose it. If the message gives no other clue, ask what they meant.