一切經音義 3.5

3.5

能阻（莊所反爾雅阻難也左傳疑也說文險也從阜且聲也且音子余也）。

能阻 (able to obstruct; the latter is zhuang/suo fan; Erya says 阻 means 'difficult'; the Zuo Tradition says 'suspicious'; Shuowen jiezi says 'perilous; composed of 阜 with 且 phonetic'; 且 is pronounced zi/yu).