If you start a new job, or agree to buy something, you might have to sign a contract.
The word contract was originally usually used to refer to marriage, and comes from the Latin com (with, together) and trahere (to draw). Which makes sense really: if you give marry someone, you’re agreeing to draw closer together, and if you sign a contract with a company, you’re agreeing to draw together with them.
Isn’t if funny though, when we use contract as a verb?