unforgettable

Infinitive complement

• project: Material that seems obvious and unforgettable to project managers at their inception may not be so transparent a few years down the line.

Adjective complement with noun phrase

• make: A spa on the terrace makes this product unforgettable.

Modifies a noun

• experience: You provided an unforgettable experience which I am sure will remain with us for ever.
• sunset: After an unforgettable desert sunset we head back to the oasis.
• sight: The picture window holds the promise of unforgettable sights.
• adventure: Experienced guides will take care to provide unforgettable diving adventures.
• journey: Come on an unforgettable journey into the world of the polar bear...
• spectacle: The Tour is sure to offer an unforgettable cricketing spectacle whichever matches you attend.

Modifying Another Word

• truly: Whether you drive your own vehicle or rent a car or RV, you'll have a truly unforgettable vacation.
• utterly: An utterly unforgettable piece of music which breaks new ground completely... sheer brilliance!
• absolutely: An absolutely unforgettable evening, out of this world!
• totally: A private tour of the Stadium is included for all parties making any event a totally unforgettable experience.
• quite: The sight of the rising or setting sun gleaming on the soft golden sandstone of the temples is quite unforgettable.
• simply: The sight of the castle on its rocky outcrop, 180 feet above the pretty village is simply unforgettable.

Used with adjective complement

• make: The canon is full of bit part walk-on artistes made unforgettable by their dialog, action or description.
• become: Sometimes the track is up and down which make the trip become unforgettable.
• prove: For those who did make the trip, like those who went to Amsterdam, it was to prove unforgettable.