The central or most essential part (n.); most important (adj.)
Academic Word List (AWL)
Academic Word List — 570 word families essential for university study. · 564 words
To put money or effort into something for future benefit
A choice between two or more options; available as another option
Something considered more important than other things; the right to be dealt with first
To regain something lost; to return to good health
A timetable of planned activities; to plan something for a specific time
Short in duration or concise in expression; a summary of key information; to inform someone concisely
to buy; something bought
A single thickness of material; one level in a series of stacked items
The study of existence and knowledge; a personal set of guiding beliefs
The base on which something is built; an endowed institution; the act of founding
To fasten or join one thing to another; to include a file with a message
Forming the essential base; a basic principle
To improve or increase the quality or value of something