1) Cast down 2) Cause dejection 3) Dampen 4) Dampen the spirits 5) Dash your hopes 6) Daunt 7) Deflate 8) Deject 9) Demoralise 10) Depress 11) Destroy hope in 12) Discourage 13) Dismay 14) Dispirit 15) Exclusively Anglo word 16) Exclusively Saxon word 17) Put a damper on things 18) Put off 19) Take away courage 1) Cast down 2) Daunt 3) Deject 4) Depress 5) Discourage 6) Disenchant 7) Disillusion 8) Dispirit 9) Sadden 
• (v. t.) To discourage; to deprive of courage and hope; to depress the spirits of; to deject.
Dis·heart'en transitive verb [ imperfect & past participle Disheartened ; present participle & verbal noun Disheartening .] [ Prefix dis- + hearten .] To discourage; to deprive of courage and hope; to depress the spirits of...
[v] - take away the enthusiasm of
put off verb take away the enthusiasm of
to depress the hope, courage, or spirits of; discourage.