'customarily-organized' originates from the combination of 'customarily' and 'organized', where 'customarily' is derived from 'custom' meaning 'habit or tradition', and 'organized' from 'organize' meaning 'to arrange systematically'.

'customarily' evolved from the Old French word 'costume', and 'organized' from the Medieval Latin 'organizare'.

Initially, 'customarily' meant 'according to custom', and 'organized' meant 'arranged in a systematic way'. The combined term retains these meanings.