'inaccurately-installed' is a compound word formed from 'inaccurately' and 'installed'. 'Inaccurately' comes from 'inaccurate' (not accurate) + '-ly', and 'installed' is the past participle of 'install'.

'inaccurately' comes from 'inaccurate', which is from Latin 'in-' (not) + 'accuratus' (done with care). 'Install' comes from Medieval Latin 'installare', from 'in-' (in) + 'stallum' (place). The phrase 'inaccurately-installed' is a modern English compound.

Initially, the components meant 'not accurate' and 'set up', and together they now mean 'set up in a way that is not accurate'.