1.  discourage(v = verb.communication) deter - try to prevent; show opposition to; "We should discourage this practice among our youth"
is one way to disapprove, reject
Derived form noun discouragement₃
Sample sentences: They discourage him from writing the letter

2.  discourage(v = verb.emotion) - deprive of courage or hope; take away hope from; cause to feel discouraged;
Antonym: encourage
Derived form noun discouragement₁
Sample sentences: The bad news will discourage him

3.  discourage(v = verb.communication) admonish, monish, warn - admonish or counsel in terms of someone's behavior; "I warned him not to go too far"; "I warn you against false assumptions"; "She warned him to be quiet"
is one way to advise, counsel, rede
Sample sentences: Sam cannot discourage Sue ; They discourage him from writing the letter

discourage, v.tr.
1 deprive of courage, confidence, or energy.
2 (usu. foll. by from) dissuade (discouraged him from going).
3 show disapproval of (smoking is discouraged).

Derivative:
discouragement n. discouragingly adv.

Etymology:
ME f. OF descouragier (as DIS-, COURAGE)

VB  dissuade, dehort, cry out against, remonstrate, expostulate, warn, contraindicate, disincline, indispose, shake, stagger, dispirit, discourage, dishearten, deter, repress, hold back, keep back, render averse, repel, turn aside, wean from, act as a drag, throw cold water on, damp, cool, chill, blunt, calm, quiet, quench, deprecate, disenchant, disillusion, deflate, take down a peg, pop one's balloon, prick one's balloon, burst one's bubble, disabuse (correction).

VB  be dejected, grieve, mourn, take on, give way, lose heart, despond, droop, sink, lower, look downcast, frown, pout, hang down the head, pull a long face, make a long face, laugh on the wrong side of the mouth, grin a ghastly smile, look blue, look like a drowned man, lay to heart, take to heart, mope, brood over, fret, sulk, pine, pine away, yearn, repine, despair, refrain from laughter, keep one's countenance, be grave, look grave, repress a smile, depress, discourage, dishearten, dispirit, damp, dull, deject, lower, sink, dash, knock down, unman, prostrate, break one's heart, frown upon, cast a gloom, cast a shade on, sadden, damp one's hopes, dash one's hopes, wither one's hopes, weigh on the mind, lie heavy on the mind, prey on the mind, weigh on the spirits, lie heavy on the spirits, prey on the spirits, damp the spirits, depress the spirits.

VB  fear, stand in awe of, be afraid, have qualms, apprehend, sit upon thorns, eye askance, distrust, hesitate, falter, funk, cower, crouch, skulk, let 'I dare not' wait upon 'I would' take fright, take alarm, start, wince, flinch, shy, shrink, fly, tremble, shake, shiver, shiver in one's shoes, shudder, flutter, shake like an aspen leaf, tremble like an aspen leaf, tremble all over, quake, quaver, quiver, quail, grow pale, turn pale, blench, stand aghast, not dare to say one's soul is one's own, inspire fear, excite fear, inspire awe, excite awe, raise apprehensions, be in a daze, bulldoze, faze, feeze, give an alarm, raise an alarm, sound an alarm, alarm, startle, scare, cry 'wolf', disquiet, dismay, fright, frighten, terrify, astound, fright from one's propriety, fright out of one's senses, fright out of one's wits, fright out of one's seven senses, awe, strike all of a heap, strike an awe into, strike terror, harrow up the soul, appall, unman, petrify, horrify, pile on the agony, make one's flesh creep, make one's hair stand on end, make one's blood run cold, make one's teeth chatter, take away one's breath, stop one's breath, make one tremble, haunt, prey on the mind, weigh on the mind, put in fear, put in bodily fear, terrorize, intimidate, cow, daunt, overawe, abash, deter, discourage, browbeat, bully, threaten.

VB  be disappointed, look blank, look blue, look aghast, stand aghast, find to one's cost, laugh on the wrong side of one's mouth, find one a false prophet, not realize one's hope, not realize one's expectation, disappoint, frustrate, discomfit, crush, defeat (failure), crush one's hope, dash one's hope, balk one's hope, disappoint one's hope, blight one's hope, falsify one's hope, defeat one's hope, discourage, balk, jilt, bilk, play one false, play a trick, dash the cup from the lips, tantalize, dumfound, dumbfound, dumbfounder, dumfounder (astonish).