Versed

adj.capable, thoughtfulformal

What it means

Knowledgeable about a subject through study or practical familiarity.

Reach for it when describing someone with sound command of a defined field

A mediator versed in housing law explained which promises the agreement could enforce.

playful
savvy
when practical know-how should sound current and informal
not when Savvy is too casual for credentials and can imply shrewdness rather than study.
everyday
familiar
when basic acquaintance is all the evidence supports
not when Familiar is weaker and may mean recognition rather than usable knowledge.
professional
experienced
when repeated practical exposure supports competence
not when Experience can accumulate without accurate or current knowledge.
professional
expert
when authoritative depth can be demonstrated
not when Expert is a stronger status claim and should not replace versed for solid familiarity.
professional
knowledgeable
when substantial information about a subject is the claim
not when Knowledgeable lacks the polished familiarity conveyed by well versed.
professional
literate
when baseline competence with a field or medium is intended
not when Literate understates deep knowledge and can sound metaphorical outside reading and writing.
formal
proficient
when ability to perform a skill matters more than subject knowledge
not when Proficient is best for execution, not simply understanding a domain.
literary
learned
when extensive scholarly knowledge suits an elevated description
not when Learned sounds academic and does not fit hands-on skill naturally.

well versed
The reviewer was well versed in both the regulation and its field consequences.
versed in
A guide versed in local ecology led the children away from the nesting ground.
deeply versed
Though deeply versed in the tradition, she welcomed corrections from younger speakers.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.