schediasm
noun
schedi·asm
ˈskēdēˌazəm,
ˈsked-
plural -s
archaic
: an extemporaneous action (as in writing) : something done offhand
Word History
Etymology
Greek schediasma caprice, from schediazein to do offhand, from schedios temporary, extemporaneous, impromptu; akin to Greek echein to have