personal, personally. When it is necessary to emphasize that a person is acting on his own rather than as a spokesman or that he is addressing people individually rather than collectively, personal and personally are unexceptionable. But usually the context makes that clear and the word is used without purpose, as it was here: 'Dr Leonard has decided to visit personally the Oklahoma parish which is the centre of the dispute …' {Daily Telegraph}. He could hardly do otherwise. Personal in many other common terms – personal friend, personal opinion, personal favourite – is nearly always equally redundant.
( Bill Bryson )
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