In the following question, four words are given out of which one word is…

Solution

The incorrectly spelled word is "Critisize". The correct spelling is "criticize" (US) or "criticise" (British).

Meanings of the words:

• Hallucination: an experience involving the apparent perception of something not present.

• Imbibing: absorbing or assimilating (can mean drinking or taking in information).

• Biannual: occurring twice a year (note: "biennial" means every two years).

• Critisize: incorrect spelling. Correct forms: "criticize" (US) or "criticise" (British); means to indicate the faults of.

Therefore, "Critisize" is the incorrectly spelled word.