'irregularly-given' originates from the combination of 'irregularly' and 'given', where 'irregularly' is derived from Latin 'irregularis', meaning 'not regular', and 'given' is the past participle of 'give', from Old English 'giefan'.

'irregularly' changed from the Latin word 'irregularis' and eventually became the modern English word 'irregularly'. 'Given' evolved from the Old English word 'giefan' to the modern English 'give'.

Initially, 'irregularly' meant 'not regular', and 'given' meant 'to bestow or present'. The combined term 'irregularly-given' maintains these meanings in a compound form.