Your search for the postposition -tł’ááh beneath, under has returned 4 entries

-tł’ááh

Łééchąą’í kin bitł’ááh góyaa ’ałhosh.

dog house 3-under down 3-sleep.NI
listenloadingplaying

The dog is asleep under the house. (YM 1987:251)

Tó bee naat’ahí yę́ę bitł’áahdi yiichxii’ lá.

water canteen past 3-bottom-di 3-rust.P DISC
listenloadingplaying

The water canteen has gotten rusty on the bottom. (YM 1987:251)

Yadiizíní bitł’ááhdę́ę́’ bigháda’shéshiizh.

can 3-bottom-from 3-through-SUP-1-poke.P
listenloadingplaying

I poked holes in the bottom of the can. (YM 1987:186)