7
Define categories for aspirated and unaspirated voiced stops, voiceless stops, and fricatives:
A=ḅḍġǵ
U=bdgɠ
V=ptkƙ
F=φþxẍ
(I’m forced to use strange characters for each of these phones due to the one-character-per-phone restriction of SCA².)
Then Grimm’s law can be reversed as follows:
U/A/_
V/U/_
F/V/_
(As far as I can tell, PIE had none of /ɸ θ x xʷ/. ...
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