How to spell FEERINGLY correctly?

If you meant to write "fearingly", a correct suggestion would be to add the "a" before the "i" to make it "fearingly". Other possible correct suggestions include "fervently", "freezingly" or "fiercely" depending on the intended meaning.

• feelingly She spoke feelingly about the impact of the pandemic on her small business.
• jeeringly The audience jeeringly booed the player as he walked off the field after missing the game-winning shot.

Attenttion

• attention
• attentions
• attenuation
• inattention