TOEIC Link Part 5: envelop versus envelope

Envelop and envelope differ by a single silent e, but that letter changes both the part of speech and the meaning. Envelop is a verb meaning to surround or wrap completely; envelope is a noun meaning the paper cover you put a letter in. Office passages mention mailing documents and surrounding conditions alike, so Part 5 can drop either word into a blank and let a careless reader pick by sight. For another office pair separated by one letter, see personal versus personnel.

The core rule: a verb versus a noun

• envelop (verb, stress on -vel-: en-VEL-op) = to surround, cover, or wrap completely. Fog began to envelop the harbor. / A sense of calm enveloped the room.
• envelope (noun, stress on EN-: EN-ve-lope) = the flat paper container for a letter or document. She sealed the report in a large envelope. / Please return the form in the enclosed envelope.

The clue is the final e and the stress. The noun envelope ends in a silent e and is stressed at the front, like the thing on your desk. The verb envelop has no final e and is stressed in the middle, like the action of wrapping. If the blank is an action, drop the e; if it is a thing, keep it.

Why Part 5 likes this pair

The two words fill different grammatical slots, so the sentence frame tells you which one fits — if you read for part of speech.

Heavy mist began to __ the entire valley by dawn.

The blank is the action the mist performs, so a verb is needed: envelop.

Each application must be submitted in a sealed __.

Here the blank is a thing — a container the application goes into — so the noun envelope is required.

Spotting the clue in the structure

Ask what the blank is doing:

• It names an action, usually after to or as the main verb (smoke envelops the building, darkness enveloped them) → choose the verb envelop.
• It names a thing, often after a, the, or sealed (a padded envelope, the return envelope, a manila envelope) → choose the noun envelope.

A reliable test: if you can put a or the in front of the blank and the word is a physical object, you need the noun envelope. If the blank follows a subject and acts on an object, you need the verb envelop. For another pair where a single silent letter marks noun versus verb, see advice versus advise.

Quick self-check

1. The signed contract was placed in a padded __ for mailing. (envelope — the noun, a container)
2. Thick smoke quickly __ the warehouse floor. (enveloped — the verb, to surround)

Takeaway

If the blank is a thing you mail a letter in, you need the noun envelope, with its silent final e and front stress. If the blank is the action of wrapping or surrounding, you need the verb envelop, with no final e and middle stress. Decide thing-or-action first, confirm with the article in front of the blank, and the one-letter gap stops being a trap.