to shout, to mourn, to invoke
謼 centers on vocal expression with strong emotion: shouting, mourning, or invoking. The common thread is a forceful, often ritualized, use of the voice.
謼 combines 言 (speech) with 虖, which likely contributes the sound and may relate to calling out. The exact historical development of 虖 is uncertain.
Words 言 beside 虖, a shape that looks like a person under a roof with a tiger's head, suggest a loud, emotional cry. Imagine someone shouting or mourning under a shelter, their voice echoing like a tiger's roar.
For コ, picture a child calling out 'co-co!' like a mourning dove, invoking comfort. The sound 'co' cues コ while the child shouts softly.