bedrock

n.

1. The solid rock that underlies loose material, such as soil, sand, clay, or gravel.
2. 1. The very basis; the foundation: Ownership of land is the bedrock of democracy.
   2. The lowest point: personal finances that were at bedrock.

The unweathered rock which underlies the soil and regolith or which may be exposed at the land surface.

The hard, solid rock at the earth’s surface or underlying surface soil; can be utilized as a firm foundation for a building.

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[Ge]

Undisturbed natural substrate below any archaeological deposits, accumulative overburden such as alluvium or colluvium, or established soil profile. The bedrock is not necessarily solid rock: gravels, sands, glacial tills, and many other kinds of relatively soft materials are, in archaeological terms, bedrock.

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Dansk (Danish)
n. - grundfjeld

Nederlands (Dutch)
basis, laagste punt, vast gesteente, betrouwbaar, vertrouwd

Français (French)
n. - base, (Géol) soubassement, (fig) base

Deutsch (German)
n. - Basis, Fundament, Felssohle

Ελληνική (Greek)
n. - βραχώδες υπόστρωμα, (μτφ.) γερό θεμέλιο, βασικές αρχές

Italiano (Italian)
rocca, fondamento, base rocciosa

Português (Portuguese)
n. - leito (m) de rocha firme (Min.), alicerce (m)

Русский (Russian)
коренная порода, почва залежи, твердый фундамент

Español (Spanish)
n. - roca de fondo, roca firme, base, fondo de la cuestión

Svenska (Swedish)
n. - berggrund, hörnsten, grundval

中文（简体）(Chinese (Simplified))
岩床, 基础, 根底

中文（繁體）(Chinese (Traditional))
n. - 岩床, 基礎, 根底

한국어 (Korean)
n. - 기반암, 최하점, 기초

日本語 (Japanese)
n. - 基盤, 床岩, 根底

العربيه (Arabic)
‏(الاسم) صخر, أساس, متين, طبقه صخريه‏

עברית (Hebrew)
n. - ‮סלע-אדמה, יסוד‬

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