ef-ih-KAY-shus
(adjective) Effective in producing the desired result.
The vaccine proved highly efficacious in preventing disease.
Fun Fact
While “effective” and “efficacious” are similar, the latter is usually used in formal, academic, or scientific contexts. For instance, in pharmaceutical trials, a drug must be “efficacious” before it can be deemed “effective” for general use. It’s a favorite in public health and policy.
dawg-MAT-ik
(adjective) Asserting opinions or beliefs in an arrogant, rigid, and often unyielding way.
His dogmatic approach left no room for compromise or alternative ideas.
Mid 17th century: from late Latin dogmaticus, from Greek dogmatikos, from dogma ‘opinion, tenet’.
Fun Fact
Dogmatic is often used in politics, academia, or religion—anywhere someone clings to a belief system so tightly that opposing views are dismissed outright. It doesn’t necessarily mean the belief is wrong—just that it’s inflexibly held. In leadership or conversation, being called dogmatic is rarely a compliment; it suggests stubborn conviction without curiosity or tolerance.