Parameter the so-called reciprocal prefix... It may be: (a) actional, (b) habituative, (c) invigorative, (d) accelerative, (e) communal, indicating united or simultaneous action, (f) collaborative, (g) reciprocal, (h) competitive, (i) reciprocative, meaning hither and thither, or in (or to or from) various directions [3a0b57e5f284dfd196cf0631b76063bf]