openmouthed (adjective) breathless: astounded
Sinonime: artlessness, candidness, credulousness, forthrightness, frankness, freshness, greenness, guilelessness, gullibility, ignorance, ingenuousness, innocuousness, innoxiousness, inoffensiveness, lack, nescience, plainness, purity, rawness, simplicity, sincerity, unaffectedness, unawareness, unfamiliarity, unknowingness, unsophistication, unworldliness, virtue