1. Too sacred to be uttered
   - ineffable, unnameable, unspeakable, unutterable 
2. Not capable of being said
   - unspeakable

See also: sacred

• hotel occupancy
• hotel plan
• hotel room
• hotel-casino
• hotelier
• hoteling
• hotelkeeper
• hotelman
• hotfoot
• Hoth
• hothead
• hotheaded
• hotheadedly
• hotheadedness
• hothouse
• Hothr
• hotline
• hotly
• hotness
• hotplate
• hotpot
• hots
• hotshot
• hotspot
• hotspur