[for the better] {adj.} or {adv. phr.} With a better result; […]

[for the devil] or [heck] or [the hell of it] {adv. […]

[for the life of one] {adv.}, {informal} No matter how hard […]

[for the most part] {adv. phr.} In general; mostly; most of […]

[for the sake of] or [for one's sake] {adv. phr.} On […]

[for the time being] also {literary} [for the nonce] {adv. phr.} […]

[for the worse] {adj. phr.} or {adv. phr.} For something that […]

[forever and a day] {adv. phr.}, {informal} For a seemingly endless […]

[forever and ever] {adv. phr.} Forever; always. - Used for emphasis, […]

[fourth-class(2)] {adv.} By fourth-class mail. * /How did the company mail […]