Choose the word most similar in meaning to: LETHAL

Appeared in: DSSSB 6 September 2024

Explanation

'Lethal' is an adjective used to describe something that is sufficient to cause death.
The word 'Deadly' is the most accurate and direct synonym, as it also means capable of causing or certain to cause death.
In pharmacology, a 'lethal dose' (LD₅₀) is a standard measure of a substance's toxicity, reinforcing the connection between the word and the concept of death.

Option A: While something lethal is always dangerous, not everything dangerous is lethal. 'Dangerous' is a broader term that implies a risk of harm or injury, which may or may not lead to death.
Option C: This is an antonym of 'lethal.' It means having a positive, helpful, or advantageous effect, which is the opposite of causing death.
Option D: This word describes the frequency of an event or object (i.e., how uncommon it is). It has no connection to the potential of something to cause harm or death.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Synonym Identification as background academic context rather than a clinical decision trigger.
In a clinical context, understanding the precise difference between terms is vital. A 'lethal dose' (LD₅₀) of a medication is a specific pharmacological measure indicating the dose that kills 50% of a test population.
A drug might have 'dangerous' side effects (e.g., causing dizziness or nausea) without being 'lethal' at a therapeutic dose. Precision in language prevents miscommunication about risks.
What if? If a patient ingests a substance described as 'dangerous' versus 'lethal', the emergency response changes. 'Dangerous' requires assessment of harm, while 'lethal' implies an immediate, life-threatening poisoning requiring urgent, aggressive intervention.

How to Approach the Question

First, analyze the given word, 'LETHAL', and determine its precise meaning. 'Lethal' means capable of causing death.
Next, examine each option to understand its definition.
A) Dangerous: Posing a risk or threat of harm.
B) Deadly: Causing or able to cause death.
C) Beneficial: Helpful or good.
D) Rare: Uncommon.

Concept Tested & Keywords

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E6 Pharmacology Katzung 16e p. 64-66

Practise the full DSSSB 6 September 2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.