/n/ — the N sound as in no, name, on

Main spellings (~99%)

⟨n⟩ ~99%

The letter ⟨n⟩ covers virtually all words with the /n/ sound.

Doubled consonants: When ⟨nn⟩ appears in the middle of a word, it still makes just one /n/ sound. Examples: dinner, funny, running.

Unusual spellings (~1%)

⟨kn⟩

The ⟨k⟩ is silent at the start of words with ⟨kn⟩.

Silent K: In words starting with ⟨kn⟩, the ⟨k⟩ is always silent: know, knife, knee, knock, knot, knight. The ⟨k⟩ was pronounced in Old English but gradually became silent.
Two ways to see this: You can think of ⟨kn⟩ as an unusual spelling of /n/, or as a silent ⟨k⟩ before ⟨n⟩ — see the silent K page for the full list. Both are valid.

⟨gn⟩

The ⟨g⟩ is silent in some words with ⟨gn⟩.

Silent G: The ⟨g⟩ is silent in ⟨gn⟩ combinations: gnaw, sign, foreign, reign, design. But note: in signature and signal, the ⟨g⟩ IS pronounced because it's in a different syllable. See the full list on the silent G page.

⟨pn⟩

The ⟨p⟩ is silent at the start of Greek-origin words.

Silent P: In words from Greek starting with ⟨pn⟩, the ⟨p⟩ is silent: pneumonia, pneumatic. English doesn't allow /pn/ clusters at the start of words.

⟨mn⟩

In some Greek-origin words.

/n/ vs /m/

N vs M: Both are nasal sounds, but /n/ is made with the tongue touching the ridge behind the teeth (alveolar) and /m/ is made with the lips together (bilabial). Compare: sun vs some, twin vs swim.