IPA: /əˌræk.nəˈfoʊ.bi.ə/
KK: /əˌræk.nəˈfoʊ.bi.ə/
A strong and unreasonable fear of spiders.
Her arachnophobia made it difficult for her to enjoy camping in the woods.
Arachnophobia is formed from "arachne" (from Greek ἀράχνη, meaning spider) and "phobia" (from Greek φόβος, meaning fear). The word describes an intense fear of spiders.
Imagine the fear of spiders ('arachne') to remember that 'arachnophobia' means a fear of spiders.