"Bubbles gargled delicately"
What language device is used here?
Oxymoron and onomatopoeia
This quote also shows how Heaney as a child saw the best in nature.
As well as plosive sounds- adds to the aggressive attitude of nature.
Onomatopoeia- Heaney also uses synesthesia (all the senses) to engage the reader, as well as convey the richness and abundance of nature.