क ख ग घ: The First Row of Consonants
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क ख ग घ ङ form the first row of Devanagari consonants, traditionally called the ka-varga, grouped by where the sound is produced in the mouth: at the back, near the throat. This ordering is not alphabetical in the English sense but phonetic. The row moves from unaspirated to aspirated and voiceless to voiced: क (ka).
ख (kha), ग (ga), घ (gha), and finally ङ, a nasal sound rarely used alone in modern Hindi but essential to the pattern. Learning this row first gives a learner the template for every other consonant row in Devanagari, since the same logical pattern, unaspirated.
Aspirated, voiced, voiced aspirated, nasal, repeats across the alphabet with only the place of articulation changing. This same organising logic, grouped by place of articulation, repeats across every remaining row of Devanagari consonants, making the ka-varga a genuinely useful template for predicting how later rows will be structured before they are even studied directly.