Correct spelling, explanation: the correct form is auxiliary, with only one -l. The word auxiliary originates from the Latin term auxilium, meaning help or aid. The English word retains a single -l in its spelling, aligning with its Latin roots. In English, when a word is derived from Latin or similar roots, the spelling often follows the pattern of the original language, unless it has been significantly altered over time. The double -l form (auxilliary) is simply a common misspelling.

Definition of auxiliary:
1. Noun, a person whose job is to give help or support to other workers
The hospital hired an auxiliary to assist the nursing staff during the busy holiday season.
As an auxiliary, her primary role was to support teachers with administrative tasks and classroom organization.
2. Adjective, giving help or support, especially to a more important person or thing
The ship was equipped with an auxiliary engine to provide backup power in case of a main engine failure.
The organization set up an auxiliary team to support the main disaster relief efforts in the affected area.

Collocations with auxiliary:
Some of the most commonly used collocations include:
1. Auxiliary engine: refers to a secondary engine used to provide backup power or assist the main engine in vehicles, ships, or machinery.
The ship’s auxiliary engine was activated when the main engine failed mid-journey.
2. Auxiliary power: refers to additional or backup power supplied to a system, often in case of a power failure.
The hospital relies on auxiliary power generators during electrical outages to ensure patient safety.
3. Auxiliary staff: workers who assist or support the main staff in an organization, often in administrative or less specialized roles.
During the holiday season, the school hired extra auxiliary staff to manage the increased workload.
4. Auxiliary verb: a grammatical term for a verb that supports the main verb in a sentence (e.g., be, have, do).
In the sentence “She is running”, the word “is” functions as an auxiliary verb.

Incorrect spelling, explanation: you can’t spell auxiliary as auxilliary because the correct spelling in English has only one -l, and the double -l form is simply a mistake. The word auxiliary comes from the Latin term auxilium, which means help or support. In Latin, the root word has only one -l. English adopted the word directly from Latin, preserving its single -l spelling. There’s no historical basis for adding the second -l. Auxilliary is just a mistake.

Incorrect spelling

Incorrect spelling