Letters we write but don't pronounce: knife, psychology, doubt
Spell with silent letter; pronounce without it
Same principle
Same principle
💡 Silent letters often come from historical pronunciation or borrowed words.
✓knife /naɪf/
✗knife /knaɪf/
K is silent before N.
✓psychology /saɪˈkɒlədʒi/
✗psychology /psaɪˈkɒlədʒi/
P is silent before S.
✓doubt /daʊt/
✗doubt /daʊbt/
B is silent in doubt, debt, subtle.