1.
fundamental; basic; foundational
Relating to the foundation or basics of something. Used to describe knowledge, skills, research, or conditions that form the essential groundwork.
基礎的な知識を身につける。
To acquire fundamental knowledge.
まず基礎的な文法を学びましょう。
Let's first learn the basic grammar.
この大学は基礎的な研究に力を入れている。
This university puts effort into fundamental research.
Common collocations: 基礎的な知識 (fundamental knowledge), 基礎的な研究 (basic/fundamental research), 基礎的な体力 (basic physical fitness), 基礎的な能力 (basic ability). Compare with 基本的 (basic — more commonly used in everyday speech) and 根本的 (fundamental — implies getting to the root cause). 基礎的 is often used in academic and formal contexts.