Approach

a. coming near to

b. approximation, a way to solve a problem
с way, path, road

Sustain

a. enable to keep up, maintain

b. suffer, undergo
с keep from falling

Relay

a. supply of fresh horses to take the place of tired ones

b. device which receives signals and transmits them with greater
strength, thus increasing the distance over which they are
carried

с place from which radio programs are broadcast after being received from another station

payload

a. passengers and cargo, but not fuel

b. bomb in a missile

с crew and instruments of a spaceship item

a. each single thing, part or object in a list

b. detail or paragraph (of news)
с number of a program