insistent

But the jolly tone gives way to something fiercer and more appropriately epic: a galloping rhythm on the drums, insistent bass and scorching guitar notes.

He also once had to pretend to be the British singer when he met his friend's four-year-old son, who was "so insistent that I was really him".

Nik describes this possibility as a "very subtle but very insistent background noise".

She was insistent, though, that there had to be a "real plan in place".

The insistent buzzing of the drone competes with his voice.