Unhurried means taking a calm and easy pace. Not slow because something is wrong — slow because there is no reason to rush.
The word is nearly always approving, which is what separates it from slow. An unhurried breakfast is a pleasure; a slow breakfast might just be cold. It suits manner as much as speed: an unhurried voice, an unhurried examination, walking at an unhurried pace. Writers reach for it to signal that somebody is entirely in control of a situation, since refusing to hurry is itself a kind of confidence. The adverb unhurriedly usually follows a verb of movement.
1adjectiveunhurriedMoving or done calmly, without rushing.
“He crossed the yard at an unhurried walk.”
synonyms: leisurely, measured
From un- + hurried.
Etymology from Wiktionary, CC BY-SA