erupt, spout
噴火（ふんか）、噴水（ふんすい）、噴出（ふんしゅつ）
eruption, fountain, gushing
On-reading (フン) is used in compounds; kun-reading (ふ(く)) is used standalone or with okurigana. Appears in many compounds — memorize the key ones rather than the kanji in isolation. This kanji forms verbs/adjectives with okurigana. Practice both the word form and compound forms.
