You don't have to understand the why, you merely need to know the what.

"If yours have, you need merely say a word to silence me."

"You're too small to make the kind of money you need merely to pay for your travel expenses."

We merely need you to help us to complete a mission.

I merely need a stone that has seen things at the right time.

Does he merely need work, or is there something technically wrong with him?

Those that merely need cleaning and new windows could be closed for several months or up to a year.

No, you merely need enough to stay in business, to keep moving, to make a dent.

They merely need to understand our problems and help us grapple with them.

He merely needed to say I have the following hash.