1 to add oil

2 to top up with gas

3 to refuel

4 to accelerate

5 to step on the gas

6 (fig.) to make an extra effort

7 to cheer sb on

1 oil

2 fat

3 grease

4 petroleum

5 to apply tung oil, paint or varnish

6 oily

7 greasy

8 glib

9 cunning

1 sliding

2 slide

1 glossy

2 sleek

3 smooth

1 gas station

1 roads are slippery due to rain (idiom)

1 lit. oily and shiny to the point of reflecting (idiom)

2 lustrous

1 arising involuntarily (idiom); spontaneous

2 to spring up unbidden (of emotion)

1 to be the most ridiculous thing in the world (idiom)

1 to suffer mental anguish (idiom)