Use perpetual when the point is no planned ending, not just ordinary durability.
Use perpetual when the point is no planned ending, not just ordinary durability.
| Incorrect | Correct |
| The company signed a perpetual contract for six months. | The company signed a six-month contract. |
| Her perpetual visa expired in May. | Her temporary visa expired in May. |
| The lamp gave perpetual light until the battery died. | The lamp gave steady light until the battery died. |
Use perpetual for problems, noise, habits, or moods that keep returning or never seem to let up.
| Incorrect | Correct |
| A perpetual visitor came once last summer. | An occasional visitor came once last summer. |
| She is perpetual late. | She is perpetually late. |
| We had a perpetual problem yesterday morning. | We had a recurring problem all week. |
Use perpetual in gardening for plants, especially roses, bred or known for repeat flowering.
| Incorrect | Correct |
| This cactus is perpetual because it survives for decades. | This cactus is perennial because it survives for decades. |
| A perpetual rose blooms once in spring. | A once-blooming rose flowers once in spring. |
| The tree is perpetual because its leaves stay green. | The tree is evergreen because its leaves stay green. |
Use perpetual as a noun mainly in finance, often for a perpetual bond or perpetual futures contract.
| Incorrect | Correct |
| The perpetual matures next Friday. | The futures contract matures next Friday. |
| She opened a perpetual at her savings bank. | She opened a savings account at her bank. |
| The issuer repaid the principal at the perpetual's maturity. | The issuer may call a perpetual, but it has no scheduled maturity. |
Use perpetual for no fixed end or unfailing recurrence, and keep the finance and gardening senses for their specialist contexts.
Permanent is substituted for perpetual when the intended idea is constant repetition, and perpetual is overstated when a clear end date exists.
From Middle English perpetuel, from Old French, and Latin perpetuus, meaning continuous or uninterrupted. The Latin form is linked with per-, meaning through, and petere, meaning to go toward or seek.