Cases of word usage

1) a payment in addition to what is usual, necessary or expected, e.g. and extra payment to workers (bonus)

2) (of a person) having the necessary ability, power, authority, skill, knowledge etc (competent)

3) without food, clothes and other things necessary for life (destitute)

4) not necessary (dispensable)

5) to the right or necessary degree, extent etc (enough)

6) to make (an event) necessary (entail)

7) to make (a tax, duty, regulation etc) officially necessary (impose)

8) accompanying but not forming a necessary part; small and comparatively unimportant (incidental)

9) necessary for completeness (integral)

10) an empty space round writing or printing on a page; an edge or border; an amount (of time, money etc) above what is estimated as necessary (margin)