1. Not allowing air or gas to pass in or out
   - airtight, air-tight

See also: tight

• has-been
• haschisch
• Hasdrubal
• Hasek
• hasenpfeffer
• hash
• hash head
• hash house
• hash out
• hash over
• hashbrowns
• hashed browns
• hasheesh
• Hashemite Kingdom of Jordan
• Hashimoto's disease
• hashish
• hashmark
• Hasid
• Hasidic
• Hasidim
• Hasidism
• haslet
• hasn't
• hasp
• Hassam