“device” vs. “devise”
Use "device" as a noun for a tool, gadget, or technique, and use "devise" as a verb meaning to plan, invent, or (in law) to bequeath real property. A reliable proofreading shortcut is to check whether the word functions as a subject or object in the sentence, which calls for device, or as the main verb describing an action, which calls for devise.
device
"Device" is a noun meaning a tool, gadget, or mechanism designed for a specific purpose ("a smoke detector is a safety device"), or, in a literary sense, a technique or strategy used in writing ("a plot device"). It comes from Old French "devis," related to "devise," both ultimately from Latin "dividere" (to divide), the underlying idea being something planned out or designed.
devise
"Devise" is a verb meaning to plan or invent something through careful thought ("she devised a clever solution"), and in legal contexts specifically, it means to leave real property to someone in a will ("he devised his estate to his nephew"). It comes from the same Old French "devis" root as "device," but English settled the spelling split so that the "-ise" ending marks the verb and the "-ice" ending marks the noun.
The real distinction
This pair follows a reliable pattern found elsewhere in English: the "-ice" ending marks a noun ("device," like "practice" and "advice"), while the "-ise" ending marks a verb ("devise," like "practise" in British spelling and "advise"). "Device" is always a thing — a gadget, tool, or literary technique. "Devise" is always an action — the act of planning, inventing, or, in law, formally bequeathing real property in a will. The noun/verb spelling pattern (-ice for noun, -ise for verb) genuinely helps here, the same way it helps distinguish "practice" from "practise" and "advice" from "advise," making this pair more predictable than many other confusable words once the underlying pattern is recognized. The specific legal sense of "devise" — bequeathing real property specifically, as opposed to "bequeath," which covers personal property in wills — is a technical distinction worth knowing for anyone reading or writing estate documents, since "devise" in that context carries a precise meaning distinct from its everyday sense of inventing or planning something. It is also worth noting that device has become an especially common word in modern technology writing, referring to phones, tablets, and countless smart gadgets, while devise remains comparatively rare outside legal and strategic contexts, which means writers drafting technology content should be especially alert to typing devise by mistake out of habit from typing device so often.
Examples with “device”
- The engineer designed a new device to measure air quality.
- Foreshadowing is a common device used in mystery novels.
- The security device alerted them to the break-in immediately.
- Her phone is just one of several smart devices in the house.
- The medical device monitors heart rate continuously.
- Flashback is a device the director used throughout the film.
- The safety device shuts off power automatically during overheating.
- Every device in the lab needed recalibration after the storm.
Examples with “devise”
- The team devised a clever workaround for the software bug.
- She devised a training plan tailored to each new employee.
- Engineers devised an entirely new method for testing the material.
- He devised a scheme to split the workload more evenly.
- The will devised the family farm to the eldest daughter.
- They devised a strategy to cut costs without layoffs.
- The estate was devised entirely to a local charity.
- She devised a simple system to track expenses each month.
Memory trick
Remember the pattern: nouns end in "-ice" (device, like practice and advice), and verbs end in "-ise" (devise, like advise) — the same rule that separates "practice" from "practise" applies neatly here too. If the word is a thing you can hold or point to, it's a device; if it's an action of planning or inventing, it's devise. One more small anchor: device pairs naturally with gadget and appliance, everyday nouns you can pick up and hold, while devise pairs naturally with plan and scheme, everyday verbs describing mental effort rather than a physical object.