Yes, this is wrong. If you said the word, this is enough and you shouldn’t say it again and again so that you can say it better.

I often repeat some letters in prayer when I want to repeat a part of my recitation. This may be because I am used to doing this and so I realise that I have repeated something only after I have said it.or sometimes it probably happens because I can saty it better that way, or sometimes it might happen because I prefer to say a few letters before I repeat a certain part of my recitation.Is it wrong for me to do this?