rathole; mousehole
A hole made by a rat or mouse, or a hole as small as one made by such a rodent.
I found a rathole in the wall.
鼠穴からネズミが出入りしている。
Rats are going in and out of the rathole.
Standard kanji spelling for 'rathole' or 'mousehole'.
Common mixed kana-kanji spelling; 穴 is the usual character for 'hole'.
Compound of 鼠 (nezumi, 'rat/mouse') and 穴 (ana, 'hole'). The reading ねずみあな is a straightforward combination.