| base(noun, cause, source, origin, bottom) |
| bottom(noun, cause, base, high, quick) |
| fundamental(noun, part, cause, quick, basic) |
| bedrock(noun, cause, quick, source, origin) |
| nadir(noun, point, bottom, nothing, pits) |
| root(noun, cause, base, source, core) |
| solid rock(noun, bottom) |
| all-time low(noun, expression, point, base, bottom) |
| basis(law, cause, source, foundation, basic) |
| essence(cause, source, origin) |
| floor |
| footing(cause, quick, source, origin, stem) |
| foundation(law, cause, source, basic, origin) |
| ground(cause, source, origin) |
| groundwork(cause, quick, source, origin, stem) |
| lowest |
| pith(cause, source, origin) |
| principle(law, foundation, basic, stipulation, tenet) |
| rudiment(law, foundation, basic, stipulation, tenet) |
| seat(cause, quick, source, origin, stem) |