How to spell WHISTFUL correctly?

If you meant to write "wistful" instead of "whistful", you're on the right track. "Wistful" conveys a feeling of yearning or longing, often tinged with nostalgia. Other correct suggestions could include "wishful", "wistfully" or "wistfulness" - all of which capture the intended meaning accurately.

• chestful She grabbed a chestful of blankets to keep her warm during the chilly night.
• fistful He grabbed a fistful of popcorn and eagerly munched on it while watching the movie.
• wistful I often find myself wistful of the good old days.

Attenttion

• attention
• attentions
• attenuation
• inattention