かぎり/ないかぎり => While A is the case/still true N2
Conditional, While
…すぎ ... => too much N4
Emphasis on degree
~ ないともかぎらない => ~ It's unlikely... won't N1
Speculation
すぎる => too much N4
に過ぎない => no more than; just; merely; only ~ N2
~且つ(かつ) => and N1
Line up, list
つつ => while; even though; despite ~ N2
にすぎない => Only A; No more than A N2
(Not)only, (Not) even
~Vた + せつな => moment, instant, juncture N1
Beyond expectations
なにひとつ~ない => nothing/not at all… N3
Invariant
とは[限「かぎ」]らない => Its not really A N2
Information, Report
かぎりだ => Very A N1
Degree/ Level/Amount