1. Definitely not
   "the prize is by no means certain"
   - not by a long sight, not by a blame sight

Antonym: by all means

• boffin
• boffo
• BOFH
• Bofors gun
• bog
• bog asphodel
• bog aster
• bog bilberry
• bog candles
• bog down
• bog hemp
• bog kalmia
• bog laurel
• bog moss
• bog myrtle
• bog off
• bog pimpernel
• bog plant
• bog rein orchid
• bog rhubarb
• bog rose
• bog rosemary
• bog soil
• bog spavin
• bog star