What does immotile mean?
Immotile means unable to move or be moved. The word is especially useful in scientific, technical, and formal contexts, where it can describe a structure, organism, or object that is fixed, motionless, or inherently incapable of movement. Although immobile is more common in everyday English, immotile has a more precise and specialized tone. In biology, for example, the term may describe a cell or organism that cannot move from one place to another. In mechanics and engineering, it can refer to a part that has been fixed in position. The word can also describe something effectively unable to continue moving because of obstruction, damage, or some other constraint. Its Latin-derived formation combines a negative prefix with a root associated with movement, making its meaning transparent: the opposite of motile, or capable of movement.
adjectiveIncapable of moving or being moved; fixed in place. It is used especially in technical, scientific, and formal contexts.
- Unable to move or be moved; fixed in place.
"The insect was so badly injured that it remained immotile at the bottom of the glass."
"The heavy machinery was left immotile until the repair crew arrived."
"The term immotile is often used in biology to describe organisms or structures that lack the ability to move."
Immotile is the precise word for something that cannot move—not merely something that has temporarily stopped moving.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does immotile come from?
Immotile comes from Latin immōtilis, formed from the prefix in- meaning “not” and mōtilis meaning “movable” or “able to move.” The Latin root is related to mōtus, “movement,” and to the English words motion, motive, and motor. The English adjective was adopted in the 17th century and has retained a more formal and technical character than the more familiar immobile.
How immotile is actually used
This is a formal and relatively uncommon word, especially outside scientific, technical, and academic writing. It is more specific than immobile in suggesting an inherent or effective inability to move.
Easily confused with immotile
Both describe an inability to move, but immotile is more often used in technical or scientific writing, while immobile is more common in general usage.