har·mat·tan 
(här′mə-tăn, här-mătn)
(här′mə-tăn, här-mătn)n.
A dry dusty wind that blows along the northwest coast of Africa.
[Akan (Twi) haramata, possibly from Arabic ḥarām, evil thing, from ḥarama, to prohibit; see x̣rm in the Appendix of Semitic roots.]