Related Clues:

• Like Coolidge's utterances
• Tranquillity
• Serenity
• Less than 1 m.p.h., as winds
• Not wordy
• Sailboater's woe
• Serene
• Not choppy
• Not long-winded
• Hardly windy
• Not at all windy
• Tranquility
• Stillness
• Short-spoken
• Controlled