What this suffix does
-fire forms compounds about fire or shooting: campfire, gunfire, crossfire, ceasefire. "wildfire" is also used figuratively: "the rumor spread like wildfire".

Suffix · forms nouns / adjectives / verbs
Forms compounds naming types of fire or gunfire: gunfire, crossfire, campfire, hellfire, wildfire, ceasefire, backfire.
Written by Bryan López, English teacher · Updated
-fire forms compounds about fire or shooting: campfire, gunfire, crossfire, ceasefire. "wildfire" is also used figuratively: "the rumor spread like wildfire".
Noun + fire.
This is not a productive rule you can apply freely: it is a closed set of fixed expressions. Learn them one by one as set phrases.
-fire/faɪər/ · sounds like "fire"
Tap the button to hear how the ending sounds. Each word in the table has its own audio.
The fixed expression is "spread LIKE wildfire" — using "like" for comparison, not "as a wildfire." One of the most common similes in journalistic English.
"Ceasefire" already implies fighting or gunshots. "Ceasefire of the war" is redundant. Fixed collocations: "declare / negotiate / sign / violate a ceasefire."
A trick to remember it
"-fire" = fire, almost always literal: camp-FIRE. gun-FIRE = the "fire" coming out of a gun. wild-FIRE is also used for a rumor that spreads as fast as a forest fire.
Exercise 1 · Form the word
Exercise 2 · Pick the right one
"The plan backfired." What does this mean?
Exercise 3 · Form the word
The suffix -fire forms compounds naming types of fire or gunfire: gunfire, crossfire, campfire, hellfire, wildfire, ceasefire, backfire.
The ending -fire is pronounced /faɪər/ · sounds like "fire". For example, "gunfire".
"gun" becomes "gunfire". It is a typical example of the -fire suffix.
Forms compounds naming types of descent, precipitation, or figurative collapse: downfall, nightfall, rainfall, windfall, pitfall, waterfall, shortfall.
Forms compounds naming types of stone, places, or concepts involving permanence and foundation: milestone, cornerstone, tombstone, keystone, limestone.
Turns a direction word into a direction adverb/adjective: inward, outward, forward. Works with almost any direction word, it is productive.
-tion, -ness, -ful, -ly, -able... every ending you need to understand thousands of words at once.