'acronichally' originates from Greek, specifically the word 'akronychos,' where 'akro-' meant 'extreme' and 'nyx' meant 'night.'

'akronychos' transformed into the Latin word 'acronychus,' and eventually became the modern English word 'acronichal' through Middle English.

Initially, it meant 'related to the extreme night,' but over time it evolved into its current meaning of 'occurring at night.'