Where does “null recurrent” come from?

null recurrent (English) comes from English recurrent, from Latin recurrens, from Latin recurrō, from Latin rĕ-, from Latin prōdūcō, from Latin prō-, from Proto-Italic *pro-, from Proto-Indo-European pro- — passed , crossed.

null recurrent (English): recurrent with infinite expected return time

Definitions

  1. recurrent with infinite expected return time

Ancestry of “null recurrent”, step by step

null recurrent traces back through two separate lines of ancestry.

via English recurrent

StepLanguageWordMeaning
1EnglishrecurrentRecurring; happening time after time;...
2Latinrecurrensrunning or hastening back; returning, reverting,...
3Latinrecurrōto run or hasten back
4Latinrĕ-back, backwards
5Latinprōdūcōto lead or bring forth, forward or out
6Latinprō-forward direction, forward movement
7Proto-Italic*pro-pro- see the Latin entry for further meanings
8Proto-Indo-Europeanpro-toward, forward
9Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
10Proto-Indo-Europeanper-before, in front; first; to go through
11Proto-Indo-Europeanpr̥tóspassed , crossed

via English null

StepLanguageWordMeaning
1EnglishnullA non-existent or empty value or set of values;...
2Middle Frenchnulnobody; no one; none
3Old Frenchnulnobody; no one; none
4Latinnūllusno one, none, not any, nothing
5Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
6Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European pr̥tós