c. 1400, "sad, sorrowful," from Latin lamentabilis "full of sorrow, mournful; lamentable, deplorable," from lamentari "to wail, moan, weep" (see lamentation). Early 15c. as "distressing, grievous." Related: Lamentably.
a lamentable decision
lame duck
lame-brain
lamely
lameness
lament
lamentable
lamentation
lamented
lamia
laminar
laminate