fi- root words — words with the fi- root

The root fi- comes from Latin fidus, meaning faithful, trust. 1 words in Dendril are built from it, including defier. Dendril shows them on a free interactive word map — no signup, no ads.

Words that use the fi- root

Explore words with fi- — words containing the fi- root and sharing its sense of "faithful, trust". Examples include defier. Click any word to see its own roots, definition, and related words.

What does fi- mean?

The fi- root means faithful, trust, from Latin fidus. Recognizing it helps you decode and remember the many English words built on this root.