Some words have letters that are silent. It may be best just to memorize these words. They make no sense so just memorize them.

knew
knife
knee
know
known
knock
knot
kneel
knit
gnat
gnash
gnaw
sign
design
resign
assign
align
comb
lamb
climb
bomb
limb
crumb
dumb
numb
thumb
built
build
building
biscuit
guarantee
guardian
hymn
column
wrong
write
wrote
written
wrap
wrinkle
wreck
wrench
wrist
answer
walk
talk
chalk
stalk
yolk
calm
palm
could
would
should
half
calf
hasten
(haste)
moisten
(moist)
soften
(soft)
fasten
(fast)
whistler
(whistle)
wrestler
(wrestle)

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