Antonyms of adj free-and-easy

1 sense of free-and-easy

Sense 1
free-and-easy, casual -- (natural and unstudied; "using their Christian names in a casual way"; "lectured in a free-and-easy style")

INDIRECT (VIA informal) -> formal -- (being in accord with established forms and conventions and requirements (as e.g. of formal dress); "pay one's formal respects"; "formal dress"; "a formal ball"; "the requirement was only formal and often ignored"; "a formal education")

Similarity of adj free-and-easy

1 sense of free-and-easy

Sense 1
free-and-easy, casual -- (natural and unstudied; "using their Christian names in a casual way"; "lectured in a free-and-easy style")
       => informal (vs. formal) -- (not formal; "conservative people unaccustomed to informal dress"; "an informal free-and-easy manner"; "an informal gathering of friends")