unrestrictive

/ˌʌnriˈstrɪktɪv/

Unrestrictive things are loose, lax, or unstructured. You might be jealous of your best friend's unrestrictive household, but remember that your parents probably have good reasons for limiting your TV time and setting a curfew.

An unrestrictive environment is one that doesn't come with a lot of limitations — it's "lax," "unsupervised," or "unstructured." This might be okay for free time, free association, or free jazz, but it probably isn't such a great idea when you're teaching, say, rocket science, electrical wiring, or space shuttle navigation.

Definitions of unrestrictive

1. adjective

   not tending to restrict
   synonyms:

   emancipative

   tending to set free

   nonrestrictive

   not limiting the reference of a modified word or phrase

   antonyms:

   restrictive

   serving to restrict

   confining, constraining, constrictive, limiting, restricting

   restricting the scope or freedom of action

   inhibitory, repressing, repressive

   restrictive of action

   limiting

   strictly limiting the reference of a modified word or phrase

   regulative, regulatory

   restricting according to rules or principles

   sumptuary

   regulating or controlling expenditure or personal behavior

   suppressive

   tending to suppress