dual pronoun, I, you and me, we two
喒 is a rare character that functions as a dual pronoun, encompassing the speaker and the listener together: 'you and me' or 'we two'. It can also refer to the first person 'I' in certain contexts.
The exact historical development of 喒 is uncertain. It combines 口 (mouth) with 昝, but the role of 昝 is unclear; it may be phonetic or semantic.
The mouth radical 口 suggests speech or self-reference, while the right side 昝 looks like a person under a roof, perhaps two people together. Imagine two mouths speaking as one, representing 'you and me'.
For サン, picture two people standing together under the sun (サン), saying 'you and me' as they share the sunlight.