Miss Bennet would not play at all amiss if she practiced more.
Examples of amiss
amiss
She said she checked regularly for updates online and didn't see anything amiss.
From the online.wsj.com
Foreman said he left Indio with no doubt that something was amiss in Ely's home.
From the heraldtribune.com
Orally trying to stop something that looks amiss, to me, sounds very reasonable.
From the washingtonpost.com
This year it falls on a Monday, and another three-day weekend wouldn't go amiss.
From the nzherald.co.nz
A bit more education on the risks involved in icy conditions would not go amiss.
From the theargus.co.uk
Lindsay should have known something was amiss since I very rarely order dessert.
From the charlotteobserver.com
If something is amiss, a facility must respond with a corrective plan of action.
From the tennessean.com
Look, it's obvious that something is terribly amiss with the Titans'running game.
From the tennessean.com
Maybe a few words from the prospective parliamentry candidate might not go amiss?
From the bucksfreepress.co.uk
More examples
Amiss(p): not functioning properly; "something is amiss"; "has gone completely haywire"; "something is wrong with the engine"
Awry: away from the correct or expected course; "something has gone awry in our plans"; "something went badly amiss in the preparations"
In an improper or mistaken or unfortunate manner; "if you think him guilty you judge amiss"; "he spoke amiss"; "no one took it amiss when she spoke frankly"
Imperfectly: in an imperfect or faulty way; "The lobe was imperfectly developed"; "Miss Bennet would not play at all amiss if she practiced more"- Jane Austen
Fault; wrong; an evil act, a bad deed; Wrong; faulty; out of order; improper; as, it may not be amiss to ask advice; Mistakenly; Astray; Wrongly