{"era":"current","word":"irrational","meaning":"not governed by reason or, in mathematics, not expressible as a ratio of integers","children":[{"era":"classical","word":"Latin irrationalis","meaning":"not reasonable; not in ratios","children":[{"era":"classical","word":"in- + rationalis","meaning":"not + rational, reasonable","children":[{"era":"classical","word":"ratio","meaning":"reckoning, account, reason","children":[],"language":"Latin"}],"language":"Latin"}],"language":"Latin"}],"language":"Modern English"}