The Sound Map

This is the payoff lesson. Hebrew squeezed the rich consonant inventory of Proto-Semitic into 22 letters; Arabic kept 28. Every merger happened by regular law, not by accident — which means the map between the two languages runs in both directions. Learn six correspondences and you own a decoder ring: you can guess Arabic words you have never seen, and recognize Hebrew hiding inside Arabic ones.

The last two rows hide the map's best party trick: the s-sounds swapped. Hebrew ש (shin, sh) answers Arabic س (plain s): שלום, سلام. But Hebrew שׂ (sin, pronounced s) answers Arabic ش (sh!): עֶשֶׂר is عَشَرَة, שְׂמֹאל is شِمَال. So a Hebrew sh usually predicts an Arabic s — and a Hebrew sin predicts an Arabic sh. Hebrew ס, meanwhile, also lands on Arabic س. Once you have heard the swap, you cannot un-hear it.

It runs in reverse just as well. Hear dhahab? Convert dh to ז: זהב. Hear thūm? Convert th to ש: שום. A useful trick for the ear: Arabic ث is, historically speaking, the sound your ש once shared an ancestor with — hearing ث as 'a ש from the old country' makes the conversion automatic.

Where the map breaks

The decoder ring predicts form, not meaning. Three thousand years of separation let meanings drift: some cognates stayed put (שלום and سلام), some slid politely (מדינה: state vs. city; שמאל: Hebrew kept 'left', Arabic شِمَال means 'north' as well as 'left' — face the sunrise and your left hand points north), and a few slid far enough to bite.