The holdings-together, spoken plural — the Grammar's own junction word for how atoms join into molecules and organisms.

Links joined so that each holds the next. A chain is exactly as strong as its weakest link and no stronger.

Held within limits. Constraint narrows what is possible and is often what makes a design decidable.

A bound placed on what may be done. Restriction is a choice removed, and it should say by whom.

Things in a fixed order where the order carries meaning. Change the order and you change the thing.

Runs taken from within a longer sequence, keeping their order. A subsequence is a selection that respects the original arrangement.

The line that holds two things in relation without making them one.