“therefore” in Latin

igitur (consequently): ergo (on that account): itaque (and so). (☞ adeo, inferential, is bad Latin; Vid: Lindem., Ruhnken, vita duumv., p. 5.): proinde (accordingly): ideo (in consequence): iccirco (on that account): igitur and ergo are also, like the English “therefore,” “then,” rightly used for resuming the connection after a parenthesis (☞ ergo igitur and ergo propterea are not classical, being found only in early and late writers; Krebs remarks that the phrase itaque ergo occurs several times in Liv.); also, in drawing an inference after a series of observations, “therefore” is rendered by quae cum ita sint (since these things are so). If the clause with “therefore” does not contain a strict inference, but only explains the results of a ground or reason previously assigned, the word is not translated, but the demonstrative pronoun of the clause is simply changed into a relative; e.g., the works of Xenophon are useful in many respects, therefore read them carefully, libri Xenophontis ad multas res perutiles sunt, quos legite studiose: therefore also, ergo etiam (this phrase has been rejected by some critics without reason; Krebs).