"Phase" = a stage or step in a process; "faze" = to disturb, unsettle, or disconcert someone, causing them to lose composure.
Noun: a stage, period, or step in a process of change or development. "The first phase of the project" = the first stage of the project. "A phase of the moon" = a lunar phase. As a verb: "phase in" = to introduce gradually; "phase out" = to eliminate gradually.
The construction project is entering its second phase, which will involve installing the electrical systems.
She went through a phase in high school where she was obsessed with classical music.
The government plans to phase out coal-powered plants over the next ten years.
Verb: to disturb, disconcert, or unsettle someone so that they lose composure. "Nothing fazes her" = nothing disconcerts her / she remains unrattled by anything. Almost always appears in negative constructions or contexts where someone remains unperturbed. "He was not fazed by the criticism" = the criticism did not disturb him.
The hostile crowd did not faze her at all — she delivered her speech calmly and confidently.
After twenty years in emergency medicine, very little fazes him anymore.
The unexpected question did not faze the candidate, who gave a clear and composed answer.
Common mistake
The typical error is writing "It didn't phase me" when you mean "It didn't faze me." "Phase" is a stage of a process — it has nothing to do with disturbing or disconcerting someone. "Faze" (to disconcert) is always a verb, never a noun, and almost always appears in negative constructions ("didn't faze", "not fazed", "nothing fazes"). If the context is emotional disturbance or loss of composure, it is always FAZE.
Trick to remember it
FAZE and PHASE are homophones but FAZE is ONLY a verb and ONLY means TO DISTURB/UNSETTLE. Trick: if you can substitute "disturb" or "unsettle" or "rattle", use FAZE. If you can substitute "stage" or "step" or "period", use PHASE. "It didn't faze her" = "It didn't disturb her." "In phase two" = "In stage two." Also: FAZE = loses a letter E compared to "phase" — it is simpler, like how someone not FAZED stays simple and unrattled.
Quick rule
Phase = stage, step, period (noun or verb "phase in/out"). Faze = to disturb, unsettle, disconcert (always a verb, almost always in negative constructions).
Did you know?
"Faze" is one of the least known words in advanced English vocabulary. It appeared in American English around 1890, probably as a dialectal variant of "feeze" or "feaze" (to disturb, frighten), which comes from Old English. The confusion with "phase" is so pervasive that many native speakers never learn that "faze" exists as a separate word. It is common to see "it didn't phase me" even in print publications.
Exercise 1 · Pick the right one
Despite all the negative reviews, the criticism did not seem to _____ the director, who remained confident the film would find its audience.
Exercise 2 · Pick the right one
The company plans to _____ out the old system over the next six months while gradually introducing the new platform.
Exercise 3 · Form the word
Phase = stage, step, period (noun or verb "phase in/out"). Faze = to disturb, unsettle, disconcert (always a verb, almost always in negative constructions).
The typical error is writing "It didn't phase me" when you mean "It didn't faze me." "Phase" is a stage of a process — it has nothing to do with disturbing or disconcerting someone. "Faze" (to disconcert) is always a verb, never a noun, and almost always appears in negative constructions ("didn't faze", "not fazed", "nothing fazes"). If the context is emotional disturbance or loss of composure, it is always FAZE.
FAZE and PHASE are homophones but FAZE is ONLY a verb and ONLY means TO DISTURB/UNSETTLE. Trick: if you can substitute "disturb" or "unsettle" or "rattle", use FAZE. If you can substitute "stage" or "step" or "period", use PHASE. "It didn't faze her" = "It didn't disturb her." "In phase two" = "In stage two." Also: FAZE = loses a letter E compared to "phase" — it is simpler, like how someone not FAZED stays simple and unrattled.
Bryan López
Founder of SpeakUP Academy