Zaay
A plain Arabic z — the dotted twin of raa, and easy for English speakers to pronounce.
Sound
Zaay (also spelled zay) is /z/, the voiced sibilant of English zoo, buzz, rose. The tongue blade approaches the alveolar ridge, the vocal folds vibrate, and air streams through a narrow channel. It is the voiced counterpart of seen (س) /s/.
This is one of the easy letters for English speakers — there is essentially nothing to relearn. Two things to keep in mind. First, zaay is non-emphatic; its emphatic counterpart in the alphabet is Zaa (ظ), which is a separate letter with a separate sound (and which itself often surfaces as /z/ in modern dialects, leading to confusion). Second, in dialects that have lost the inherited /ð/ of dhaal in classical or learned vocabulary, that sound resurfaces as /z/, written with the original ذ but pronounced like zaay.
Zaay is stable across dialects.
Forms
Connecting behavior
Zaay is a non-connector to the left, like raa, daal, dhaal, alif, and waw. It joins to the letter on its right when one is there, but never extends a tail to its left. Within a word it always closes a connected segment.
Easy to confuse with
Zaay shares its skeleton with raa (ر) — same swooping curve below the baseline, distinguished only by the single dot above zaay. It can also be momentarily confused with dhaal (ذ), which also has a single dot above, but dhaal's body sits on the baseline like daal, while zaay dips below it.
Examples in common words
A note on handwriting
The body of zaay is the same curve as raa, drawn in a single stroke that swoops below the baseline. The dot above is small and is sometimes positioned right at the top of the curve rather than floating well above. The presence of a dot — at all — is what distinguishes the letter from raa, so writers tend to be more careful with it than with the dot of dhaal.