Incorrect spelling, explanation: the correct spelling is detailed, not detailled, because of standard English spelling rules. Detailed comes from the word detail + the suffix -ed (to form the past tense or past participle). In English, when adding -ed to a verb that ends in an unaccented vowel + consonant, we do not double the final consonant (unless the word follows specific rules like permit → permitted).

Correct spelling, explanation: the word detailed comes from the verb detail (meaning to describe something thoroughly or itemize it), which itself originates from the French word détail, meaning a small part or item. Detailed is simply the past participle/adjective form of the verb detail. In English, adding -ed to a verb does not usually double the final -l unless the word follows specific rules (e.g., cancel → cancelled in British English). Detailled is an incorrect form.

Definition of detailed:
Adjective, giving a lot of information with many details
The report provided a detailed analysis of the company’s financial performance over the past year.
She gave me detailed instructions on how to assemble the furniture, making the process much easier.

Collocations with detailed:
Some of the most commonly used collocations include:
1. Detailed information: specific and precise facts about something.
Before booking the trip, she asked for detailed information about the hotel and its amenities.
2. Detailed plan: a well-structured and carefully thought-out strategy.
The architect presented a detailed plan for the new building’s construction.
3. Detailed account: a complete and thorough version of events or facts.
The journalist wrote a detailed account of the political negotiations.
4. Detailed instructions: step-by-step guidance on how to do something.
The manual contains detailed instructions for assembling the furniture.