slander
誣 centers on making false spoken accusations: slandering or defaming someone with untrue words.
誣 combines 言 (speech) with 巫 (shaman), likely suggesting false or deceptive speech associated with shamanistic practices. The exact historical development is uncertain.
The left side 言 is speech, and the right side 巫 looks like two people (人) around a workbench (工). Imagine a shaman-like figure spreading false words between two people, slandering someone.
For フ, imagine a fool (フ) spreading slanderous lies: the fool's words are false and damaging.