Fundamental Principles on Which a Thing Is Based

This page is the CodyCross answer for the clue below from Health and Fitness, Group 2138, Puzzle 1 (Weighted Vests).

Question is: Fundamental Principles on Which a Thing Is Based

and the answer is: BEDROCK

Word Meaning:

BEDROCK — (countable, uncountable, geology, mining, engineering, construction) The solid rock found at some depth below the ground surface.

Definitions from Wiktionary.

Fundamental Principles On Which A Thing Is Based - Health and Fitness CodyCross Answers | CodyCross Solutions