Well-established and tested; known to work or succeed based on extensive experience.

(chemistry) A method of representing the three-dimensional structure of a molecule in which simple lines represent bonds in the plane of the image, wedge-shaped lines represent bonds towards the viewer, and dashed lines represent bonds away from the viewer.

(idiomatic) A place or part of a place, especially small or remote.

(idiomatic) To take care of every detail, even minor ones; to be meticulous or thorough.

(US) hide and seek

Synonym of chalk and cheese (“two things that are very different”)

(US, slang) An inexpensive, inelegant eatery; a greasy spoon. / (idiomatic) A quick, temporary fix, estimate, or the like.

A heavy iron ball attached to a prisoner's leg by a chain as a means of restraint. / (slang) One's wife, as a symbol of restraint. / (figuratively) Anything that restricts one's freedom or opportunities.

(idiomatic) Done or constructed in a hasty, approximate, temporarily adequate manner, but not exact, fully formed, or reliable for a long period of time.

(of someone lying down, asleep or attempting to sleep) to be constantly moving, unable to lie still