Why Tibetan letters stack

Superscripts, subscripts and stacks — the logic behind those beautiful clusters.

Once you know the 30 letters and 4 vowels, you’ll start noticing syllables built from more than one stacked consonant. That’s not decoration — Tibetan spelling can stack a small letter above the main consonant (a superscript), below it (a subscript), before it (a prefix) or after it (a suffix), sometimes several at once.

A stack is still pronounced as a single syllable; the extra letters shape the sound and, in modern spoken Tibetan, often go silent altogether. Here are four real, everyday words that show each type of stack.