Definitions

1. verb

to deprive of enthusiasm or courage; discourage or dishearten

“The news unheartened the crowd, who began to lose hope.”

2. verb

to make (something) less appealing or attractive

“The unappealing decor unheartened the potential buyers.”

3. verb

to remove the heart or heartwood from (a tree)

“The carpenter had to unhearten the tree before making the furniture.”