"Not turn a hair" means to remain completely calm and show no fear, surprise, or other emotion, even when faced with a frightening, shocking, or difficult situation. It implies someone has excellent composure and doesn't react outwardly to something that would normally cause an emotional response.
Choose the meaning of the idiomatic phrase: Not turn a hair means?
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Question context
This question is part of 🗣️ Verbal Ability within the broader 🧠 Aptitude Mastery subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.