γγ, τσ and τζ

Three more pairs finish the consonant set. γγ is never a double g: it is the same ng sound as medial γκ (αγγούρι, εγγονός) - the spelling is historical, the sound is one. τσ and τζ are the two affricates: τσ is ts as in cats (τσάντα, κορίτσι), τζ is tz as in adze (τζατζίκι, τζάκι). Each is a stop plus a hiss glued into a single sound. English speakers routinely flatten τσ to s or ch and τζ to j; both are wrong, and both stop being a problem once you hear the stop at the front. Together with μπ, ντ and γκ, these are the clusters that make a preceding movable -ν stay put.