venturesomeness

uskaliaisuus, uhkarohkeus The degree or quality of being venturesome.
1899: Joseph Conrad, Youth And Two Other Stories http://etext.lib.virginia.edu/etcbin/ot2www-pubeng?specfile=/texts/english/modeng/publicsearch/modengpub.o2w&act=surround&offset=178365160&tag=Conrad,+Joseph,+1857-1924:+Youth+And+Two+Other+Stories,+1899&query=+venturesomeness&id=ConYout

Somebody must lead the way. I just showed that the thing could be done; but you men brought up to the use of steam cannot conceive the vast importance of my bit of venturesomeness to the Eastern trade of the time.