Substratum

مترادف و متضاد substratum

1. noun The lowest or supporting part or structure
   Synonyms: base, basis, bed, bottom, foot, footing, foundation, fundament, ground, groundwork, seat, underpinning
2. noun Any stratum or layer lying underneath another
   Synonyms: substrate, footing, base, frame, bed
3. noun An indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population
   Synonyms: substrate