clenched

"You need to control your anger."

"We owe them our thanks for bringing the project to a successful close."

"The fast train to town only stops at the main station, not the smaller ones. "

"Keep a firm hold on the handlebars."

"From Earth, we could observe maria, the dark, ancient lava plains on the Moon, with just a pair of binoculars. "

"tightly clenched fingers"

"He clenched his fist in frustration when his team lost the game. "

"The carpenter closed the gap in the fence with a new piece of wood. "

"The exam of the child's handwriting revealed several areas needing improvement. "

"After a few slips, the tires gripped the pavement."

"The complicated instructions on the new software difficult me from completing the project on time. "

"The storm during all night. "