Cases of word usage

1) considered final and without the need for change or addition (definitive)

2) an absence of or need for (something) (lack)

3) to go round (a place) to see that all is well, to look out for people doing wrong, in need of help etc (patrol)

4) to need (the usual word); to demand (something); insist on (something) as a right or by authority (require)

5) a place for the treatment of people who have been ill and need test and care (sanatorium)

6) to make a person, thing thoroughly wet; soak; to fill (a market, need etc) completely; to cause (one substance) to absorb the greatest possible amount of another (saturate)

7) to make, keep, a person, thing safe (from loss, death, injury etc); (dated) except: 'all save him'; to free (a person) from the need of using (something) (save)

8) to attend to (customers) in a shop, restaurant etc; to offer (food) to people; to be satisfactory (for a need or purpose) (serve)

9) deficiency, need (shortness)

10) help given in time of need (succour)