Kh, H, and the Arabic-Letter Spellings

Iranian Persian has a real sound contrast between خ kh and ه/ح h. خ is a voiceless fricative made at the back of the mouth; ه and ح normally share a much lighter glottal h. Persian spelling therefore distinguishes two sounds but three letters: خ tells you kh, while the choice between ه and ح is usually lexical history rather than pronunciation.

English speakers face two separate traps. English k often releases with a puff of aspiration, but Persian خ is not “k plus air.” At the same time, Arabic learners may try to give ح a pharyngeal sound [ħ]. Neither substitution matches ordinary Iranian Persian.

Kh: sustained friction, not an aspirated k

For خ /kh/ [x~χ], raise the back of the tongue toward the soft palate or uvular area but leave a narrow channel. Air continues through that channel and creates friction. There is no complete closure. The sound resembles ch in Scottish loch or German Bach, not English k in key.

Hold the friction briefly at the beginning of khâr and khâle. If the tongue seals and then releases, the result is [kʰ], an aspirated k, not Persian kh. If the constriction disappears entirely, it becomes h.

H: one Iranian sound, two common letters

Persian ه and Arabic-derived ح both normally represent /h/ in Iranian speech. Make the sound at the glottis, as in English ahead, without the rough back-of-the-mouth friction of خ. In casual contexts intervocalic h can be quite light, but it does not thereby become kh.

The initial consonant is the same /h/ in هوا havâ and حال hâl. The spelling contrast survives because the words have different histories. ح occurs especially in Arabic loans; ه occurs in native vocabulary and in loans. Origin can offer a clue, but there is no dependable sound test. Memorize the letter as part of each word.

Arabic ح is a voiceless pharyngeal fricative in careful Arabic. Using that sound in an Arabic quotation or Qur'anic recitation is appropriate. Using it in unmarked Iranian حال sounds like an Arabic pronunciation, not a more careful Persian one. (formal) Iranian speech keeps the Persian /h/ merger.

The contrast in a minimal pair

The words خار khâr “thorn” and هار hâr “rabid” differ only in the first sound. This is a useful minimal pair because replacing kh with h can change the word.

Practice the pair without changing the vowel or adding an English-style [k] release: khâr—hâr. The first has oral friction; the second has open-mouth breath from the glottis.

This natural phrase alternates h and kh several times: حالم begins with h, خوب with kh, and خسته‌ام with kh. Keep each constriction independent; do not let one consonant assimilate to the other.

When final ه is not pronounced h

The written letter ه has another job: after a consonant it often helps write a final unstressed e, as in خانه khâne “house” and بچه bache “child.” In those words there is no final h. By contrast, ماه mâh “moon/month” and one reading of ده dah “ten” end in consonantal h.

Letter position does not settle the issue: the word must be known. Written ezafe after silent he introduces another yeh, خانه‌ی من khâne-ye man; see Final He and the Written Ezafe Form.

Loanword spellings: hear h, remember ح or ه

The merger of ح and ه creates homophonous spelling choices, much like the merged ق/غ system. Words such as حرف harf “word,” حقیقت haqiqat “truth,” همراه hamrâh “companion/together,” and هتل hotel “hotel” all begin with ordinary Iranian h where they have h at all. Their different letters do not license different Persian pronunciations.

Spelling is not productive here: knowing that a word is formal or borrowed does not let you safely guess ح. Consult a dictionary and learn the visual form.

Register: a stable contrast inside changing sentences

The kh/h contrast remains in careful and colloquial Iranian speech even when surrounding grammar and vowels change. Compare:

The colloquial line has khune and khube, but خ is still kh and ه in هوا is still h. More extensive h-loss belongs to register-specific pronunciation, not to the basic letter contrast.

Common Mistakes

1. Pronouncing خ as aspirated English k

2. Hardening ه into kh

3. Giving Persian ح the Arabic pharyngeal sound

4. Pronouncing every final ه as h

5. Spelling h by sound alone

Key Takeaways

Persian makes the sound decision systematic—خ is kh, while ه and ح are h—but the spelling decision partly arbitrary. Keep kh as friction rather than aspiration, use ordinary h for both h-letters, and memorize which letter each word contains.