- reckon (n.)
- Old English gerecenian "to recount, relate," from West Germanic *(ga)rekenojanan (cf. Old Frisian rekenia, Middle Low German 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." I reckon, used parenthetically, is now dialectal (Southern U.S.), but dates from c.1600 and formerly was in literary use (Richardson, etc.). Related: Reckoning (c.1300).