to step forward

to step in

to step into the breech

to step off

to step on it/on the gas

to step out

to step out of line

to step up a gear

to step/tread on someone’s toes

Step on it!

to step into the breach

in step

He stepped into the lion’s den

Steps towards national and international cooperation

to be in a stew

stewardess

sth. is like herding cats

stich’n bitch session

I stick on the stamp

to stick around

to stick at something

to stick in one’s craw

to stick in one’s mind

to stick it out

to stick one’s head round a corner