/ˈsʌbtrɛntʃ/ or /ˈsʌbtrɛntʃ/ (UK) or /sʌbˈtrɛntʃ/ (US)

Definitions

1. verb

to dig or cut a trench slightly below the main level of the ground

“The engineer was tasked with subtrenching the irrigation system to ensure better water flow.”

2. noun

a trench dug or cut slightly below the main level of the ground

“The subtrench for the irrigation system had to be carefully maintained to prevent erosion.”