一緒に => together N5
決して~ない => never; by no means ~ N3
一度に => all at once N3
[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
一通り => Basically, (get) over, done N2
Base, base
一方だ => more and more; continue to ~ N2
一応 => more or less; pretty much; roughly; tentatively ~ N2
一体 => …the heck; …in the world; …on earth N3
一方 => on one hand, on the other hand; although ~ (conjunction) N2
一口に…といっても => Although in general... N2
Evaluate
一方では...他方では => On the one hand N2
Compare
に決まっている => certainly; I’m sure/certain that; it must be the case that ~ N2