There is no opposite for intermittent action (coming repeatedly over time). The closest would be constantly or continuously, but they are not opposites.
The opposite of sustained is intermittent or sporadic, meaning not continuous or consistent.
Intermittent.
Intermittent.
The opposite of abrupt could be gradual, slow, or incremental.Calm, kind, nice...
On the weather forecast they said that it would be mainly fine with intermittent showers.
Intermittent is perhaps the word
intermittent
As intermittent means occurring at irregular intervals, a possible sentence could be:Because of the rugged terrain, the signal from the telecommunications tower was intermittent, and the lost hikers had difficulty using their mobile phones to call for help.
Intermittent
what word is opposite of prudent
The opposite of anything is it's absence. Silence would be the opposite of a word spoken.