podstawa

nf. basis, base, foundation; bottom layer; principal element, fundamental part; grounds, basis for belief or disbelief; knowledge on which to base belief; fundamentals, system of ideas or principals which serve as a base or foundation; rudiment, fundamental element, basic point

base; ground

Grundlage; Grund; Basis

base; fundamento

1. (logarytmu) base 2. (trapezu) base