lying (n.1)

"reclining," early 13c., verbal noun from lie (v.2) "to recline." Lying-in "a being in childbed" is attested from mid-15c.

"untruthfulness, falsehood," c. 1300, "the telling of lies," verbal noun from lie (v.1) "to tell an untruth."

"being prostrate," late Old English, present-participle adjective from lie (v.2) "to recline."

"untruthful," early 13c., present-participle adjective from lie (v.1) "to tell an untruth." Related: Lyingly.