Past Tense of “hide”
The past tense of hide is hid; the past participle is hidden.
Why “hide” behaves this way
"Hide" comes from Old English "hydan," historically a weak verb whose expected past participle would simply have been "hided," matching its simple past "hid." The modern participle "hidden," with its extra -en ending, is actually a later analogical formation — English speakers, centuries after "hydan" had already settled into a weak conjugation, reshaped its participle to match the -en pattern of strong verbs like "ridden" and "bitten," giving "hide" a genuinely mixed, hybrid conjugation: a weak simple past (hid) paired with a strong-looking participle (hidden) that was never part of the verb's original grammar.
This kind of after-the-fact strengthening, where speakers add a strong-verb ending to a verb that was never actually strong, is fairly rare in English and makes "hide" a useful case study for how irregular patterns can spread by analogy rather than survive by unbroken descent — unlike, say, "ride/rode/ridden," where the -en ending is a genuine inheritance from Old English strong-verb grammar, not a later addition.
The common confusion
There's minimal confusion between "hid" and "hidden" themselves since the rule is standard (hid for simple past, hidden after have/has/had); the more interesting real-world mix-up is with the unrelated noun "hide" meaning animal skin, a completely different word from a separate Old English root ("hyd") that happens to be spelled identically to the verb by coincidence.
How it's actually used
"Hide" and "conceal" overlap closely but differ slightly in register and implication — "hide" is the everyday, neutral verb usable for anything from toys to feelings, while "conceal" leans more formal and often implies a more deliberate, sometimes deceptive act, which is why legal and journalistic writing favors "conceal" ("concealed a weapon," "concealed the truth") over the more casual "hide" in serious contexts. "Hide" also appears in the fixed idiom "hide and seek," where the noun phrase functions as the name of a game rather than a literal instruction, and in "hide out," describing someone staying concealed for an extended period, typically to avoid capture or attention. Tanners and leatherworkers still use the unrelated noun "hide" constantly in trade vocabulary ("cowhide," "rawhide"), a reminder that the coincidence between the verb and the animal-skin noun runs deep enough to have generated its own separate cluster of compound words. Poker and card games also use "hide" loosely to describe concealing a tell or a hand’s strength, a specialized competitive sense layered on top of the everyday meaning of concealment.
Across the tense system
"Hidden" functions comfortably as a standalone adjective independent of any sentence about an act of hiding — "a hidden message," "hidden costs," "hidden talent" — a use so common that these fixed phrases rarely call to mind the literal verb they derive from, unlike the participle used in an active sentence ("she has hidden the key"). "Hide and seek" the children’s game is grammatically frozen as a noun phrase and never conjugates on its own, unlike the ordinary verb use in a full sentence.
Common real mistakes
A frequent error is using "hidden" as the simple past without a helping verb ("she hidden the key" instead of "she hid the key"), likely because "hidden" feels like the more complete, "finished" sounding form. The reverse error, using bare "hid" after have/has/had ("she has hid the key" instead of "has hidden"), also occurs, especially among speakers generalizing from simpler verbs where the same form covers both slots, like "put" or "cut."
Examples
- She hid the gifts before the kids came home.
- He has hidden his feelings for years.
- They hid behind the curtain during the game.
- We had hidden the evidence before anyone noticed.
- The remote is hidden somewhere in this couch.
- She hides her nerves well.
- Nothing was hidden from the investigators.
- He's hiding something, I can tell.
Memory trick
Remember that "hidden" got its extra -en ending later, borrowed by analogy from strong verbs like "ridden" — it wasn't there originally, which is why "hid" alone (no -en) still correctly covers the simple past. And keep the animal-skin noun "hide" mentally filed as a completely different word that only looks like a coincidence.