That does not meddle or interfere; not characterized by meddling.

(un-, prefix1 affix 4.)

Not officious (in various senses). In later use esp.: disinclined to intervene; unobtrusive.

to let alone (In Old English also lǽtan án, Middle English †let one.) let-alone n.; now only attributive in the sense of ‘laisser-aller’.

That does not interfere.

Not meddlesome.

Designating an attitude, practice, or policy characterized by a lack of interference or intervention. Cf. hands-on, adj. 1a.

Of regulation, checks, governance, etc.: restrained, moderate; not strict, thorough, or detailed.