(of a television or radio broadcast) Transmitted without encryption.

(Incoterm) without charge to the purchaser for delivery on board a carrier (originally a ship), at a specified location or point; used in such phrases as FOB destination to specify the point where the title of goods passes from the seller to the buyer

Without trouble.

In which smoking is not allowed.

(chemistry, physics) A molecule, ion or atom that has one or more unpaired electrons, and which is generally highly reactive (and therefore often occurs only as a transient species).

Loose rein(s), as of a horse. / (figuratively) The absence of constraints; freedom to make decisions.

Not requiring any payment.

Without any payment being required.

(idiomatic) Chaos; a chaotic situation lacking rules or control. / (video games) Deathmatch, sometimes specifically one in which every player is pitted against all the others.

A document entitling the bearer to free transportation. / (figuratively) An exemption from normal processes. / (baseball) An intentional walk.