fist
The word shimatteru means that something is closed.
Classroom is a closed compound word.
Both closed.
Swadling is and English verb which means wrapping tightly in garments or cloth. It is primarily used describing a baby wrapped in a receiving blanket.
Paper is a closed syllable word.
Yes, the word 'fist' is a noun, a singular, common, concrete noun; a word for a hand with tightly closed fingers, a word for a thing. The word 'fist' is also a verb; to strike or grasp with a clenched hand.
The word clenching means to tightly grip your hand or hands, to close or squeeze together or to clinch a bolt. Mostly it is referred to when using your hands.
to push
jam
A word that would mean the same as gripping tightly could be Grasp or Cluch/Clench.
The word "taut" rhymes with "bought" and means pulled tightly.
grip or cling
You could say, "Her lips were pursed." It means her lips were tightly closed.
The word is clutch. Note that this is a verb and a noun at the same time.
I used all the force I could to pry open the tightly closed lid on the pickle jar.
The word manu means hand.
grip