substratum

土台,根底,基礎

substratum の類語

base, bottom, foundation, end, side, outside, inside, surface, interface, substrate, bed, water, matter, story, earth, ground, air, level, floor, groundwork, basis, underpinning, substructure, rock bottom, wave front, bedrock, course, stuff, stage, fire, step, nature, material, band, seat, palate, zone, measures, gallery, element, grounds, belt, deck, root, layer, principle, fundamental, radical, component, substance, basement, tier, celestial sphere, hard palate, belly, underneath, natural world, shelf, building block, thickness

substratum の反意語

inside, outside, middle, beginning

substratum の言い換えを探すには

substratum（土台）の類語・言い換え（パラフレーズ）を、日本語訳つきで関連度順に並べています。英作文の語彙を増やしたいとき、長文読解で本文と選択肢の言い換えを見抜きたいときに使えます。