狐凭鼠伏 is an idiom
狐凭鼠伏hú píng shǔ fú
象狐狸、老鼠那样潜伏在里面。
Origin 《广东军务记·三元里平夷录》：“逆夷务狐凭鼠伏，潜避两炮台中，不敢出入。”
Word breakdown for “狐凭鼠伏”: Open in Reader →
凭凴HSK 5top 2kAmong the 2,000 most common words variant of 凭[píng]
凭憑HSK 5top 2kAmong the 2,000 most common words 1.to lean against2.to rely on3.on the basis of4.no matter (how, what etc)+1 more+2 more 鼠HSK 5top 5kAmong the 5,000 most common words (bound form) rat; mouse
1.to lean over2.to fall (go down)3.to hide (in ambush)4.to conceal oneself+7 more+8 more