一切經音義 3.31

3.31

不憚（唐爛反鄭箋詩云憚難也畏也集訓云辭也驚也說文忌疾也從心單聲也）。

不憚 (undaunted; the latter is tang/lan fan; Zheng's notes to the Odes say: '憚 means difficult, or afraid'; Jixun says: 'To decline; to be startled'; Shuowen jiezi says: 'To dread and detest; composed of 心 with 單 phonetic').