Tending to induce drowsiness or sleep; extremely boring.
From Latin 'sopor' (deep sleep) plus '-ficus' (making), literally meaning 'sleep-making.' Used in medical contexts since the 17th century for sleep-inducing drugs, then extended to describe anything that causes drowsiness through boredom.
Think 'soap-orific' — imagine being so bored by a soap opera that it puts you to sleep! The 'sopor' root appears in 'soprano' too, but here it's all about that deep, deep sleep.
Complete word intelligence in one call. Free tier — 50 lookups/day.