ppl. a. (UN-1 10.)

1

1849.  De Quincey, English Mail Coach, Wks. 1862, IV. 322. By the word ‘sudden’ [Cæsar] means ‘unlingering.’

2

1887.  Bowen, Virg. Æneid, I. 655/101. Armed with his royal mission the chief unlingering speeds.

3