en_tn/luk/06/48.md

built the house's foundation on solid rock

"dug the foundation of the house deep enough to reach a foundation of solid rock." Some cultures may not be familiar with building on bedrock, and may need to use another image for a stable foundation. (See: rc://en/ta/man/translate/figs-explicit)

foundation

the part of a house that connects it to the ground. People in Jesus' time dug down into the ground to the solid rock and then began to build on the rock. That solid rock was the foundation.

solid rock

"bedrock." This is the very large, hard rock that is deep under the soil.

torrent of water

"fast-moving water" or "river"

flowed against

"crashed against"

shake it

Possible meanings are 1) "cause it to shake" or 2) "destroy it."

because it had been well built

This can be stated in active form. Alternate translation: "because the man had built it well" (See: rc://en/ta/man/translate/figs-activepassive)