Fusion

noun

/ˈfjuː.ʒən/

A nuclear reaction in which two or more light atomic nuclei combine to form a heavier nucleus, releasing energy in the process.

✍️ Usage in a UPSC answer

The new social-welfare architecture represents a deliberate fusion of state capacity and grassroots participation, weaving administrative efficiency together with community ownership to ensure that benefits reach the last citizen.

Synonyms

amalgamationmergerblendingcoalescenceintegrationsynthesis

Antonyms

fissionseparationdivisiondispersal

🌱 Word Family

fuse (v/n), fused (adj), fusible (adj), infuse (v), diffuse (v/adj), transfusion (n)

🔡 Root

Latin fūsiō = a melting/pouring; fundere = to pour, melt + -ion = process/result

📜 Etymology

From Latin fūsiō ("a melting, pouring"), from fundere ("to pour, melt").

🧠 Memory Hook

Think 'fuse' — when you fuse two wires, they pour together into one; from Latin fundere, 'to pour/melt', the same root as 'foundry' where metals are melted and merged.

📝 Seen in UPSC Question Papers

Prelims 2016 — Nuclear Technology
Prelims 2015 — Physics

Real UPSC previous-year questions whose text uses “Fusion” — proof this word earns its place on your list.

🔬 Science & Technology 📖 Seen in: Nuclear Technology, Nanotechnology & N...

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