03/06/2026
The "Janus Words" (Contronyms)
English is famous for its contradictions, but the most confusing are the Contronyms—words that are their own opposites. They are named after Janus, the two-faced Roman god of beginnings and transitions.
Sanction: It can mean to give official permission (e.g., "The government sanctioned the project") OR to impose a penalty (e.g., "The government imposed sanctions on the country").
Cleave: It can mean to split something apart (e.g., "The axe cleaved the log") OR to stick firmly together (e.g., "They cleaved to their beliefs").
Screen: It can mean to show a movie (e.g., "They will screen the film") OR to hide something from view (e.g., "The trees screen the house from the road").
Because English is a "mongrel" language—blending Germanic, French, Latin, and Norse roots—these opposing meanings often survive because they evolved from completely different historical words that happened to end up with the same spelling.
Which of these surprises you the most—the way our words drift, the poetic naming of habits, or the contradictions in our dictionary?