pair

Two alike or identical things taken together; often followed by of.

Ting, ting, ting! went the bell again. Every body sat down; the curtain shook, rose sufficiently high to display several pair of yellow boots paddling about, and there it remained.

Day after day, with the stamp and shuffle of sixty pair of bare feet behind me, each pair under a 60-lb. load.

Two alike or identical things taken together; often followed by of.

[S]he had finished the second sock, and pulled its pair out of the bag before handing them to her husband.

Must be good at athletics, home repairs, making mince interesting and finding the pair to the other glove.

Two people in a relationship, partnership or friendship.

Spouses should make a great pair.

Used with binary nouns (often in the plural to indicate multiple instances, since such nouns are plural only, except in some technical contexts).

a pair of scissors; two pairs of spectacles; several pairs of jeans

A couple of working animals attached to work together, as by a yoke.

A pair is harder to drive than two mounts with separate riders.

To group into one or more sets of two.

The wedding guests were paired boy/girl and groom's party/bride's party.

Brown as I am, an Ethiopian dame / Inspired young Perseus with a gen’rous flame; / Turtles and doves of diff’ring hues unite, / And glossy jet is paired with shining white.

to link two electronic devices wirelessly together, especially through a protocol such as Bluetooth.

It was not possible to pair my smartphone with an incompatible smartwatch.

If your computer has a built-in, non-Microsoft transceiver, you can pair the device directly to the computer by using your computer’s Bluetooth software configuration program but without using the Microsoft Bluetooth transceiver.

To bring two (animals, notably dogs) together for mating.

To come together for mating.

The raven, in short, when he pairs, which he does at the earliest moment permitted by the laws of ravendom, pairs for life […]

To engage (oneself) with another of opposite opinions not to vote on a particular question or class of questions.

To impair, to make worse.

Why dreghis þou þis dole, & deris þi seluyn? / Lefe of þis Langore, as my lefe brother, / Þat puttes þe to payne and peires þi sight.

It were good therefore, that Men in their Innouations, would follow the Example of Time it ſelfe ; which indeed Innouateth greatly, but quietly, and by degrees, ſcarce to be perceiued : For otherwiſe, whatſoeuer is New, is vnlooked for ; And euer it mends Some, and paires Other […]

To become worse, to deteriorate.