mainstay
🇺🇸
/ˈmeɪnsteɪ/
🇬🇧
/ˈmeɪnsteɪ/
noun
R
The most important part of something that helps it exist or be successful.
Math is a mainstay of the school curriculum.
数学は学校カリキュラムの主要な柱です。
translation
主柱
語形変化
Plural
mainstays