Which prefix means under, below?

a passageway under the ground; an electric underground railway

a person who is under someone else in rank or importance

a person with the highest power, power above everyone else's

under the skin

above average in quality; excellent

below the freezing point

something that is beyond what is expected

to put under someone else's control

submarine

to put under water

a person who stands over or above someone in rank; a manager in charge of someone else

To submerge something is to put it

super- means

sub- means

Supersonic means

Subways are found

If I don't ____________ it on time, my article won't be in this week's paper.

There was an accident on the tracks and the ____________ was shut down for over an hour.