1. Without formality
   "he visited us informally" 
2. With the use of colloquial expressions
   - colloquially, conversationally

See also: informal

Antonym: formally

• yo-ho-ho
• yo-yo
• yob
• yobbery
• yobbish
• yobbishness
• yobbo
• yobibit
• yobibyte
• yobo
• yodel
• yodeler
• yodeling
• yodeller
• yodelling
• yodh
• yodle
• yoga
• Yogacara
• yogh
• yoghourt
• yoghurt
• yogi
• Yogi Berra
• yogic