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invade
To enter a place forcefully or unexpectedly.
invader
One who enters a place to conquer or harm.
invalid
person with a disability or health issue
invalidate
To make something no longer valid or acceptable.
invaluable
Extremely useful or valuable.
invariably
Always; without exception.
invariant
Something that remains unchanged.
invasion
an attack by an armed force to conquer
invasive
Tending to spread and harm local ecosystems.
invent
to create something new and original
invention
a unique idea or concept
inventive
Creative and original in ideas.
inventor
a person who creates something new
inventory
A list of goods or items on hand.
inverness
A city in Scotland known for its beauty.
inverse
mathematical reciprocal of a number
inversely
In a manner opposite to something else.
inversion
a meteorological phenomenon of temperature change
invert
to reverse position or order
invertebrate
An animal without a backbone.
inverter
Device that converts direct current to alternating current.
invest
To put money into something for profit.
investigate
To look into something carefully.
investigation
A careful examination to find facts or answers.