This is the 6274th most frequent Japanese word.
コア
"コア" (koa) means "core" or "central part."
Here, 'コア' (core) is used as a term to indicate the central or principal aspect of functionality.
このソフトウェアのコア機能はデータ分析です。
The core functionality of this software is data analysis.
In this context, 'コア' describes a member as fundamental to the structure or operation of the team.
彼はチームのコアメンバーです。
He is a core member of the team.
'コア' refers to the main or central parts critical to the product's quality.