(chiefly in the negative) so much; so often; so long; particularly; especially

Used when something comes to mind: to recall / Used to express agreement: yeah, of course

transplant rejection / allergic reaction

chain reaction (series of events) / chain reaction (type of nuclear reaction)

an overreaction

nuclear reaction

overreaction

so, like that, in such a way, such

yes, yeah; it's like that; that's how it is; I see. (interjection to show that the speaker is paying attention)

seeming that, seeming like, appearing that