suffixes

In general, do not hyphenate compounds with common suffixes such as –less, -long, -out, -over, -wide, -wise (clueless, yearlong, departmentwide, clockwise). Similarly, do not hyphenate most constructions using –up (cleanup, makeup, startup), but there are exceptions (follow-up, grown-up, close-up, shake-up).

Hyphenate when using –in (break-in).