The incorrectly spelt word in the given options is "Incomfortable." The correct spelling is "Uncomfortable."

Here are the correct spellings and definitions of the words:

• Maintain: To keep in a particular state or condition.
• Maiden: A young unmarried woman.
• Uncomfortable: Causing or feeling physical discomfort or unease.
• Incomfortable: This is the incorrectly spelt word. The correct spelling is "Uncomfortable."