1547. Baldwin, Mor. Philos., 111. Those which be vndiligent, carelesse, and sluggish.
1570. Levins, Manip., 69. Vndiligent, incurius.
1649. Jer. Taylor, Gt. Exemp., I. Disc. iv. 122. He that is apt to be angry … may at some time or other be surprized when his guards are undiligent.
a. 1684. Leighton, Com. 1 Pet. iii. 19–21. Why wear you out the day of grace … as uncertain of Christ, yea, as undiligent after Him, as you were long ago?
1886. Ruskin, Præterita, II. ix. 330. Though perfectly well-behaved, he was undiligent and effectless.
Hence Undiligently adv.
1645. Milton, Tetrach., Wks. 1851, IV. 209. Cameron…, commenting this place not undiligently, affirmes that [etc.].
