'rigidly' originates from Latin, specifically the word 'rigidus,' where 'rigid-' meant 'stiff or unyielding.' 'Control' originates from Latin 'contrarotulare,' meaning 'to check against a duplicate register.'

'Rigidus' transformed into the Old French word 'rigide,' and eventually became the modern English word 'rigid.' 'Contrarotulare' evolved into the Old French 'contreroller,' and eventually became the modern English word 'control.'

Initially, 'rigid' meant 'stiff or unyielding,' and 'control' meant 'to check or verify.' Over time, 'rigidly-controlled' evolved to mean 'strictly managed or governed.'