cp ../dir5/dir4/dir3/dir2/file[1234] .
or (in Bash)
cp ../dir5/dir4/dir3/dir2/file{1..4} .
If the file names are non-contiguous, you can use
cp ../dir5/dir4/dir3/dir2/{march,april,may} .
cp ../dir5/dir4/dir3/dir2/file[1234] .
or (in Bash)
cp ../dir5/dir4/dir3/dir2/file{1..4} .
If the file names are non-contiguous, you can use
cp ../dir5/dir4/dir3/dir2/{march,april,may} .