Alack is considered archaic, meaning it's rarely used in modern English and sounds old-timey.

Old-fashioned Use

It's mostly seen in classic literature, poetry, or in a historical context to add a traditional flavor.

Literary Connotation

Use 'alack' to express a heartfelt regret or when you're lamenting about something sad.

Expressing Sorrow

 play from pups and adults alack the pack settled on some shade to escape the heat all of a sudden one of the adult males ran off after skulking hyena who dared come too close away from the protection of their den the answers will be faced with many challenges to survival in this harsh environment the puppies learned