Past Tense of “creep”
The past tense of creep is crept; the past participle is crept.
Why “creep” behaves this way
"Creep" descends from Old English "creopan," a strong verb whose ablaut pattern originally paralleled "choose" and "freeze," though centuries of sound change and leveling eventually pulled "creep" toward a weak-verb-style "-t" ending instead, producing the modern "crept" rather than a strong-verb form like "cropen." This partial shift from strong to weak conjugation, called "analogical leveling," affected several once-strong English verbs to varying degrees, and "creep" is a clear example of the process not quite finishing.
The noun "creep," now a common informal insult for an unsettling or unpleasant person, developed relatively recently, in the 20th century, as a direct figurative extension of the verb's sense of moving slowly and stealthily — someone metaphorically "creeping" around in a way that makes others uneasy, a genuinely modern slang coinage layered on top of a thousand-year-old verb.
The common confusion
"Crept" rarely gets misspelled or mistensed; the distinction that actually matters is literal physical creeping (an insect creeping along the floor) versus the equally common figurative sense of gradual, often unwelcome change ("prices crept upward," "doubt crept into her mind").
How it's actually used
"Creep" extends widely into figurative gradual change — prices "creep" upward, doubt "creeps" in, age "creeps" up on you — all describing slow, often unnoticed or unwelcome progression, a metaphor distinct from the literal sense of slow physical movement. "Creepy," the adjective derived from this verb, describes something that produces an unsettling, skin-crawling feeling, a common everyday descriptor for anything from a person's behavior to an eerie location. Geology and engineering use "creep" as precise technical vocabulary describing the slow, continuous deformation of materials under stress over long periods ("metal creep," "soil creep"), a specialized scientific sense with real structural safety implications. "Give someone the creeps" is a common informal idiom describing an unsettling feeling caused by a person or situation, closely related to the adjective "creepy" discussed above.
Across the tense system
"Creeping" as a present participle functions as an adjective in phrases like "creeping doubt" or "creeping inflation," describing a gradual, almost imperceptible increase or spread, a common figurative pattern in both economic and emotional writing. "Creep up on" describes something approaching gradually and almost unnoticed until it suddenly becomes undeniable, whether a deadline, an illness, or a realization, a distinctly gradual-then-sudden pattern this phrasal verb captures precisely. Horticulturalists specifically use "creeping" to classify low, spreading plant varieties ("creeping thyme," "creeping phlox"), a botanical naming convention built directly on the verb's literal sense of slow, ground-level spread.
Common real mistakes
"Creeped" turns up occasionally as an over-regularized past tense, though notably the phrasal verb "creeped out" (made to feel uneasy or disturbed) does legitimately use the regular "-ed" form even in standard modern English, a genuine exception worth knowing since it doesn't follow the irregular pattern of the base verb. A further subtlety: "scope creep," a project-management term describing a project's requirements gradually expanding beyond its original boundaries, extends the verb's core sense of slow, often unwelcome change into a specific professional context distinct from any physical movement. A final point: "creep" as a modern slang verb ("creeping on someone's social media," meaning secretly viewing their posts) is a distinctly internet-era coinage, extending the older sense of stealthy movement into digital surveillance of another person's online activity. A separate stylistic issue is overusing "creep" figuratively in formal writing, where a more precise verb like "gradually increase" or "slowly emerge" might communicate the same idea with less colloquial flavor.
Examples
- The cat crept silently across the room.
- Doubt has crept into every conversation since the announcement.
- Prices crept upward throughout the year.
- We had crept past the sleeping guard without a sound.
- Vines creep along the old stone wall.
- A strange feeling crept over him as he entered the house.
- She's creeping closer to a personal record this season.
- That guy at the party was a total creep. (unrelated noun/slang)
Memory trick
Connect "crept" to the same partial strong-to-weak shift seen in a handful of other English verbs, and remember the modern slang noun "creep" (an unsettling person) is a distinctly 20th-century coinage, not an ancient use of the word at all.