If, by sturdy, you mean rigid, the answer is no. Without a diagonal brace, a square can easily be distorted into a rhombus.
Sturdy is not a verb but an adjective and therefore has no past tense, unless you mean "this was sturdy" etc.
more sturdy
The desk was sturdy.
Sturdy
what meaning of sturdy
Don Sturdy was created in 1925.
Julian Sturdy was born in 1971.
a lock that is sturdy and not easy to open get a dudley lock they are very hard and sturdy and dont break very easily.
the table is sturdy enough to sit on it.
A sturdy bed can be purchased at any high quality furniture and bed stores. IKEA offers extremely sturdy beds. Some of their sturdy beds also come with built-in storage.
A police officer needs a new pair of sturdy shoes
Robert Sturdy was born on 1944-06-22.