a, o, j, e, f, g, l, n, p, c, m, i, u are letters that make 'jumping-off place'
lace, PI, la, PIN, ping, ACE, MP, ump, AC, pi, ng, off, ace, CE, in, jump, jumping, place, pin, IN, LA, Ping, Ac, Ce, In, La, lac are words within 'jumping-off place'
1 possible definitions for 'jumping-off place'
Under this definition, jumping-off place is a noun and has the following properties:
point of departure has the same meaning as jumping-off place
'jumping-off place' can be a type of root, origin, source, rootage, beginning.
"one day when I was at a suitable jumping-off place I decided to see if I could find him", "my point of departure was San Francisco"