可谓
kě wèi · HSK 7
it could even be said
可谓 = 可 (can) + 谓 (to say) — literally can-say, so it could even be said
可 carries the can/may sense (as in 可以), and 谓 means to say or call (as in 所谓, so-called). Glue them and you get the can-be-said framing used to make a strong claim.
可 — mouth 口 + breath marker 丁 (modified)
可 originally depicted a mouth (口) with a curved stroke suggesting exhaled breath or speech, conveying approval or assent. From this came the meaning 'to permit' or 'can,' as granting permission was expressed verbally. Today it broadly means 'may,' 'can,' or 'approve.'