hy·po·ven·ti·late [ hpō véntə làyt ](past and past participlehy·po·ven·ti·lat·ed, present participlehy·po·ven·ti·lat·ing, 3rd person present singularhy·po·ven·ti·lates)
intransitive verb
Definition:
breathe too shallowly: to breathe in an unusually slow and shallow way leading to a dangerous buildup of carbon dioxide in the blood