The knight of Ivanhoe . . . underlies the challenge of Brian der Bois
Guilbert.
Sir W. Scott.
Un`der*lie", v. i. To lie below or under.
Un"der*lie` (?), n. See Underlay, n., 1.
Un`der*line" (?), v. t. 1. To mark a line below, as words; to
underscore.