WHICH WORD?
partly / partially
Partly and partially both mean 'not completely':The road is partly/partially finished.Partly is especially used to talk about the reason for something,often followed by because or due to:
I didn't enjoy the trip very much,partly because of the weather.Partially should be used when you are talking about physical conditions:
His mother is partially blind.
partially
adverb
partly; not completely:The road was partially blocked by a fallen tree.◆ a society for the blind and partially sighted (= people who can see very little).◆ It's only partially true.
partly
adverb
to some extent; not completely:Some people are unwilling to attend the classes partly because of the cost involved.◆ He was only partly responsible for the accident.