underlain
Found below, foundationally
Underlain is the past participle of underlie—to lie beneath or form the foundation of something.
Rock formations are underlain by older strata; arguments are underlain by assumptions.
The valley is underlain by limestone.
Her cheerfulness was underlain by deep anxiety.
The word appears almost exclusively in technical or formal writing.
Solid stone underground
- substratumFoundational layer beneath
- stratumHorizontal layer of material
- substrateUnderlying supporting material
- sedimentParticles settling in liquid
mantle · crust · limestone · shale · granite · aquifer · formation · deposit
Unverified belief accepted as true
- premiseFoundation for logical argument
- basisUnderlying support or principle
- principleFundamental truth or standard
- frameworkUnderlying support system
subtext · undercurrent · rationale · presupposition · foundation · groundwork · logic · reasoning
Underlying support structure
- substructureSupporting base beneath
- underpinningFoundational support beneath
- footingSecure ground position
- baseSupporting bottom structure
groundwork · support · piling · slab · basement · reinforcement · anchorage · buttress
bedrock
Solid stone underground
- substratumFoundational layer beneath
- stratumHorizontal layer of material
- substrateUnderlying supporting material
sediment · mantle · crust · limestone · shale · granite · aquifer · formation · deposit · clay
assumption
Unverified belief accepted as true
- premiseFoundation for logical argument
- basisUnderlying support or principle
- principleFundamental truth or standard
framework · subtext · undercurrent · rationale · presupposition · foundation · groundwork · logic · reasoning · theory
foundation
Underlying support structure
- substructureSupporting base beneath
- underpinningFoundational support beneath
- footingSecure ground position
base · groundwork · support · piling · slab · basement · reinforcement · anchorage · buttress · pier
concealed
Made invisible deliberately
latent · unseen · subsurface · submerged · covered · masked · underground · embedded · invisible · shrouded