overlabour
To cause to labour excessively; to overwork.
transitive
Tis time to ſet at eaſe the ſmoaking Horſe.
But over labour'd with ſo long a Courſe,To labour upon excessively; to refine unduly.
transitive
To belabour or emphasise excessively.
I don't want to overlabour what is obvious here.
Where it comes from
From Middle English over-labouren, equivalent to over- + labour (verb).
Adapted from the Wiktionary entry overlabour (CC BY-SA 4.0).