Word preceding a blessing, perhaps

• Sound that triggers "Gesundheit"
• Word said explosively
• What "Gesundheit!" is a response to
• Symptom of a cold nose? Not half!
• It may precede a blessing
• Cold blast that's often blessed?
• It may initiate a blessing
• Sound muffled by a handkerchief
• Sneezy's outburst

Wiktionary Word definitions in Wiktionary
interj. (context onomatopoeia English) The sound of a sneeze. n. The sound of a sneeze.