Question:
A person who talks in their sleep.
A person who talks in their sleep.
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Common one-word substitutions:
Insomniac = Person unable to sleep.
Somniloquist = Person who talks in sleep.
Optimist = Person with positive outlook.
Updated On: Jun 8, 2026
- Insomniac
- Somniloquist
- Philanthropist
- Optimist
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The Correct Option is B
Solution and Explanation
Concept:
One-word substitution questions test vocabulary by replacing a phrase or description with a single precise word.
A person who talks while sleeping is described by a specific term in English vocabulary.
Step 1: Understand the given description.
The phrase states: \[ \text{A person who talks in their sleep} \] This refers to someone who unconsciously speaks while sleeping.
Step 2: Analyze Option (A).
\[ \text{Insomniac} \] means a person who suffers from insomnia or inability to sleep. This does not fit the description.
Step 3: Analyze Option (B).
\[ \text{Somniloquist} \] comes from words related to sleep and speaking. A somniloquist is a person who talks during sleep. Therefore this exactly matches the given description.
Step 4: Analyze Option (C).
\[ \text{Philanthropist} \] means a person who loves humanity and helps others. This is unrelated.
Step 5: Analyze Option (D).
\[ \text{Optimist} \] means a person who expects positive outcomes. Again, this is unrelated.
Step 6: Choose the correct answer.
Hence, \[ \boxed{\text{Somniloquist}} \] is the correct one-word substitution.
Step 1: Understand the given description.
The phrase states: \[ \text{A person who talks in their sleep} \] This refers to someone who unconsciously speaks while sleeping.
Step 2: Analyze Option (A).
\[ \text{Insomniac} \] means a person who suffers from insomnia or inability to sleep. This does not fit the description.
Step 3: Analyze Option (B).
\[ \text{Somniloquist} \] comes from words related to sleep and speaking. A somniloquist is a person who talks during sleep. Therefore this exactly matches the given description.
Step 4: Analyze Option (C).
\[ \text{Philanthropist} \] means a person who loves humanity and helps others. This is unrelated.
Step 5: Analyze Option (D).
\[ \text{Optimist} \] means a person who expects positive outcomes. Again, this is unrelated.
Step 6: Choose the correct answer.
Hence, \[ \boxed{\text{Somniloquist}} \] is the correct one-word substitution.
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