In the following question, four words are given out of which one word is incorrectly spelt. Select the word that is spelt incorrectly.

Introduction / Context:
This is another spelling recognition question. You are given four words, and your job is to identify the one that is not spelled according to standard English. The others are common words that appear frequently in academic and general reading. Spotting the error requires familiarity with the correct forms or careful observation of typical letter patterns.

Given Data / Assumptions:
- Options: Acquaintence, Appeasement, Abnormality, Accentuate. - Only one option is incorrectly spelt. - The focus is on recognising correct vowel and consonant placements.

Concept / Approach:
The noun meaning a person you know slightly but who is not a close friend is spelled acquaintance, with the sequence a i n t a n c e at the end. The option Acquaintence incorrectly uses e n c e instead of a n c e. The other three words, appeasement, abnormality and accentuate, are spelled correctly. Therefore, Acquaintence is the wrongly spelt word.

Step-by-Step Solution:
Step 1: Examine Appeasement. Appeasement is spelled a p p e a s e m e n t and the option Appeasement matches this correct form. Step 2: Examine Abnormality. Abnormality is spelled a b n o r m a l i t y, and the given option is correctly spelled. Step 3: Examine Accentuate. Accentuate is spelled a c c e n t u a t e, and the option has the correct sequence and double c. Step 4: Examine Acquaintence. The standard spelling is acquaintance, with a n c e at the end, not e n c e. Therefore Acquaintence is incorrect.

Verification / Alternative check:
Recall common usage: You might say She is just an acquaintance, not a close friend, or He has a wide circle of acquaintances. In both cases the word appears with the a n c e ending. The incorrect form acquaintence does not appear in recognised dictionaries. Meanwhile, the other words occur commonly: political appeasement, mental abnormality, and to accentuate the problem, all matching the provided spellings. This comparison confirms that Acquaintence is the misspelt option.

Why Other Options Are Wrong (as answers):
Appeasement is correctly spelled with double p and ea in the middle. Abnormality is correctly formed from abnormal plus ity and does not contain any misplaced letters. Accentuate is correctly spelled with the c c e n t u a t e pattern, and is a standard dictionary form.

Common Pitfalls:
Many learners confuse the endings ance and ence, because both are pronounced similarly. Exam setters frequently test this confusion with pairs like attendance versus dependence and acquaintance versus sentence. A practical tip is to make a personal list of ance and ence words and review them regularly. Over time, your visual memory of these words from reading will guide you to the correct spelling more reliably than trying to apply a simple rule.

Final Answer:
The incorrectly spelt word is Acquaintence; the correct spelling is acquaintance.