English
mailrun
From mail + run.
Proto-Germanic *malhō ‘leather bag’
Frankish *malhu ‘bag’
Old French male ‘bag, wallet’
Anglo-Norman male
Middle English male ‘bag’
English mail
Proto-Indo-European *h₃reyH- ‘to boil, churn’
Proto-Germanic *rinnaną ‘to run’
Old English rinnan ‘to run’
Middle English rinnen ‘to run’
Middle English runnen ‘to run’
English run
Today it means
noun A transport route which carries and delivers mail.
Language periods are conventional ranges, not dates for this word.
Etymograph / mailrun