To draw up to, or near; approach; forthwith; to be; i.e. alias; if, even if; 就是. It is intp. as 和融 united together; 不二not two, i.e. identical; 不離 not separate, inseparable. It resembles implication, e.g. the afflictions or passions imply, or are, bodhi; births-and-deaths imply, or are, nirvana; the indication being that the one is contained in or leads to the other. Tiantai has three definitions: (1) The union, or unity, of two things, e.g. 煩惱 and 菩提, i.e. the passions and enlightenment, the former being taken as the 相 form, the latter 性 spirit, which two are inseparable; in other words, apart from the subjugation of the passions there is no enlightenment. (2) Back and front are inseparables; also (3) substance and quality, e.g. water and wave.

A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous

(即) yat…tat, eva, anantaram; ananya, arvāk, idānīm, evaikyam, ca, tatas, tathā hi, tathaiva, tāvat, tvarita-tvaritam, punar, -mātra, yat…tad eva, yad idam, yad uta, yāvatika, sa evāsau, saṃ- √vṛt, sadyas, samanantara, samasta, samāna, hi.

佛教漢梵大辭典, 平川彰 Buddhist Chinese-Sanskrit Dictionary, Akira Hirakawa

p.387 - p.393