blame
吡 centers on verbal blame: using words to criticize or find fault with someone.
吡 combines 口 (mouth) with 比, which likely contributes the sound. The structure suggests blame or criticism spoken aloud.
A mouth (口) comparing (比) someone unfavorably: 吡 is to blame or criticize with words.
For ヒツ, imagine a sharp hiss of blame: "Hits!" The sound "hits" cues ヒツ as the mouth delivers a verbal hit.