Southpaw is an informal word for someone who is left-handed. It is especially used for a left-handed baseball pitcher or boxer.

// The team’s new pitcher is a southpaw with a wicked knuckleball.

To devolve is to gradually go from an advanced state to a less advanced state, or to pass something, such as responsibility or power, from one person or group to another at a lower level of authority.

// Somehow the debate devolved into a petty competition to see who could get more applause.

// Community leaders hope that the new government will devolve more power to the community itself.

Expeditious is a formal word that is used to describe someone acting in a quick and efficient way, or something done in such a manner.

// Both sides hoped for an expeditious resolution of the dispute.

Rigmarole refers to a long, complicated, and annoying process, description, etc.

// We went through the rigmarole of installing, registering, and activating the software before we found out it wouldn’t work.

To divulge something, especially secret or private information, is to make it known.

// Rather than divulge the baby name we’ve chosen, we’re waiting till the little one arrives to make introductions.

Balmy is an adjective that is often used to describe weather that is warm, calm, and pleasant. It can also be used to describe someone or something (such as an idea) that is foolish or irrational.

// After a long, eight-hour drive, we were rewarded with a mild, balmy evening at our vacation spot on the shores of Lake Erie.

// Despite being a devout Green Bay fan, she finds the idea of attending games in head-to-toe yellow and green body paint to be a bit balmy.

An oxymoron is a combination of words that have opposite or very different meanings, such as "cruel kindness" or "open secret." In broader usage, oxymoron can also refer to something (such as a concept) that is made up of contradictory or incongruous elements.

// Some of Shakespeare's most famous plays are filled with oxymorons such as "loving hate" and "tragical mirth."

Something or someone described as lackadaisical is lacking in interest, enthusiasm, or zest.

// Feeling particularly lackadaisical in the summer heat, they lazily tossed a ball back and forth.