What this suffix does
-going creates compound adjectives and nouns with several related meanings: movement in a direction (outgoing, ongoing), regular attendance or participation (churchgoing, theatergoing), and suitability for a context (easygoing, seagoing). The suffix appears in everyday words (outgoing, easygoing) as well as in more formal or technical compounds (seagoing, thoroughgoing). Its flexibility makes it one of the more versatile compound elements in English.