possible ilpossible impossible inpossible irpossible

The only correct spelling from your list is "impossible." The others are either misspellings or non-existent words.

Here's a brief breakdown:

• possible: Able to be done.
• impossible: Not able to be done; can't be achieved or occurring.

The prefixes "il-", "in-", and "ir-" do exist in English but are used with different root words:

• il-: typically used with words starting with "l" (e.g., illegal).
• in-: used with words starting with varied letters (e.g., incomplete).
• ir-: used with words starting with "r" (e.g., irregular).

If you have any further questions about these prefixes or related topics, feel free to ask!