1. In a grave and sober manner
   - soberly, staidly 
2. To a severe or serious degree
   "is gravely ill"
   - badly, severely, seriously, critically

See also: grave

• blocking agent
• blockish
• blocky
• Bloemfontein
• blog
• blogger
• blogosphere
• Blok
• bloke
• blokeish
• blokey
• blokish
• blolly
• blond
• blonde
• blonde lilian
• blondness
• blood
• blood agar
• blood bank
• blood blister
• blood brother
• blood brotherhood
• blood cell
• blood clam