Bonds tightly

FUSES

["Think of what happens when metals are joined together under intense heat or when two things merge into one inseparable unit."]

"Bonds tightly" hints at the idea of joining things firmly together, which is exactly what "fuses" do—whether in electrical wiring or melting metals. The word also plays on its literal meaning (like a fuse in explosives) and its figurative use (merging things into one). It’s a straightforward definition with no hidden tricks, just a clear match for something that creates a strong, unbreakable connection.