As the girl looked at him something of his unreckoning courage passed into her.
He went his way, grouchy and unreckoning, secure in the sanctity that hedges a cook.
Passed on to her fellows, it was caught up with an ardour equally mad and unreckoning.
To Pittsburgh especially where men deal with devil-may-care risks and great stakes, come the adventurous and the unreckoning.
Impulse wild and unreckoning upleaped in the heart of Dick Colton then and there.
c.1200, recenen, from Old English gerecenian "to explain, relate, recount," from West Germanic *(ga)rekenojanan (cf. Old Frisian rekenia, Middle Dutch and Dutch rekenen, Old High German rehhanon, German rechnen, Gothic rahnjan "to count, reckon"), from Proto-Germanic *rakinaz "ready, straightforward," from PIE *reg- "to move in a straight line," with derivatives meaning "direct in a straight line, rule" (see regal).
Intransitive sense "make a computation" is from c.1300. In I reckon, the sense is "hold an impression or opinion," and the expression, used parenthetically, dates from c.1600 and formerly was in literary use (Richardson, etc.), but came to be associated with U.S. Southern dialect and was regarded as provincial or vulgar. Related: Reckoned; reckoning.