1

stick-to-itiveness; perseverance; persistence

2

radical (esp. one that tends to ionize easily)

See also: 基 (reading き, entry #1)

3

root

(Mathematics)

4

indriya (faculty of the body having a specific function, i.e. the sensory organs)

(Buddhist term)

1

root (of a plant)

2

root (of a tooth, hair, etc.); center (of a pimple, etc.)

3

root root (of all evil, etc.); source; origin; cause; basis

4

one's true nature

5

(fishing) reef