Make raspy

• Get rough, as a voice
• Become raspy, as one's voice
• Make rougher, as a voice
• Become laryngitic
• Become harsh, as a voice
• Mourinho: 'Arsenal's defending to get rougher'

Wiktionary Word definitions in Wiktionary
vb. (context transitive intransitive English) To make or become hoarse.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Hoarsen \Hoars"en\, v. t. [imp. & p. p. Hoarsened ; p. pr. & vb. n. Hoarsening .] To make hoarse. I shall be obliged to hoarsen my voice. --Richardson.