1. (adverb) in a serious manner

• earnestly
• in earnest

2. (adverb) to a severe or serious degree

• badly
• gravely
• severely

1. (adverb) in a serious manner

• earnest
• sincere
• solemn
• serious

2. (adverb) to a severe or serious degree

• dangerous
• dangerous
• grave
• grave
• grievous
• grievous
• life-threatening
• life-threatening
• serious
• serious
• severe
• severe
• severe
• terrible
• wicked