I repeat asking about "g" > "k", "d" > "þ", "b" > "p", "k" > "h", "t" > "þ" alternation in Germanic languages
Old English growan Russian (со)зревать Gothic ---
Old English corn Russian зерно Gothic kaurno
Old English teran Russian драть Gothic (ga)tairan
Old English þorn Russian тёрн Gothic þaurnus
I mean,
If Old English corn and growan are cognate
Why are Old English teran and þorn not cognate?