vinegarish

adjective [原级]不愉快的；尖酸的；乖戾的；有醋味的

Aiken being right would mean Eliot showing a "thin and vinegarish hostility towards the modern world" and sounding a note of "withered dogmatism".
如果艾肯的观点是正确的，那就意味着艾略特对现代世界表现出一种“尖锐且愤恨的敌意”，并流露出一种“枯竭的教条主义”的色彩。