‘Basicly’ seems logical enough, doesn’t it? We learn that adding ‘ly’ makes a word an adverb. But there are variations on how we add ‘ly’, and in this case we have to expand it to ‘ally’.
‘Basically’ is an adverb that indicates that something is done or understood in a simple way. It is most often used as a sentence adverb to modify a whole sentence:
“Basically, all you have to do to pass this class is show up and pay attention.”