という意味だ => This means... N4
意向形 => volitional form​ N4
決して~ない => never; by no means ~ N3
[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
に決まっている => certainly; I’m sure/certain that; it must be the case that ~ N2
に[決「き」]まっている => A is a given, A must be the case N2
Information, Report
… がいい ... => ... I hope that ... N3
Expected
たいがい => in general N2
Repetition, habit
~ようが...まいが => whether or not; regardless N1
〜がさいご(が最後) => if you do... negative result N1
Decisive (resolute decision)
いちがいに…ない => Impossible... in general N2
Description
...たいんですが => want N4
How to say the beginning