underscore(n = noun.communication) underline - a line drawn underneath (especially under written matter);
is a kind of stroke
Derived form verb underscore₂

1.  underscore(v = verb.communication) emphasise, emphasize, underline - give extra weight to (a communication); "Her gesture emphasized her words"
is one way to accent, accentuate, emphasise, emphasize, punctuate, stress
Sample sentences: Somebody ----s something; Something ----s something; Somebody ----s that CLAUSE

2.  underscore(v = verb.communication) underline - draw a line or lines underneath to call attention to;
is one way to mark
Derived form noun underscore₁
Sample sentences: Somebody ----s something

   To draw a mark or line under; to underline. J. Tucker. [1913 Webster]

underscore, v. & n.
--v.tr. = UNDERLINE v.
--n. = UNDERLINE n. 1.

VB  indicate, be the sign, of, denote, betoken, argue, testify, bear the impress, of, connote, connotate, represent, stand for, typify, symbolize, put an indication, put a mark, note, mark, stamp, earmark, blaze, label, ticket, docket, dot, spot, score, dash, trace, chalk, print, imprint, impress, engrave, stereotype, make a sign, signalize, underscore, give a signal, hang out a signal, beckon, nod, wink, glance, leer, nudge, shrug, tip the wink, gesticulate, raise the finger, hold up the finger, raise the hand, hold up the hand, saw the air, suit the action to the word, wave a banner, unfurl a banner, hoist a banner, hang out a banner, wave the hand, wave a kerchief, give the cue, show one's colors, give an alarm, sound an alarm, beat the drum, sound the trumpets, raise a cry, sign, seal, attest, underline, call attention to, give notice.