I’m a native British English speaker with two postgraduate degrees and I still come across words that I know the meaning of but when I think to use them in conv

I’m a native British English speaker with two postgraduate degrees and I still come across words that I know the meaning of but when I think to use them in conversation I realise that don’t know how to pronounce them. Sometimes you just have to say ‘I’m not sure if I’m saying this right but...’ and have a crack at it.