strait-laced

strait-laced is an   Adverb

Definition:

[1] Bound with stays. Let nature have scope to fashion the body as she thinks best; we have few well-shaped that are strait-laced. Locke.

[2] Restricted; stiff; constrained. [R.] Fuller.

[3] Rigid in opinion; strict in manners or morals.

Synonyms: