Not as good as ordinarily expected.
Substandard means work not reaching a reasonable level of competence
A reputable contractor will not use substandard materials when constructing a building.
The substandard replacement parts failed under the stress of normal wear and tear.
No...that's not the answer!!
sunstandard english
No, substandard usage is generally avoided in formal writing and communication as it can affect clarity and professionalism. However, in informal settings or when used intentionally for effect, it may be deemed acceptable.
Lanyards . . . maybe?
substandard product
Using the Poisson approximation, the probability is 0.0418
standard and substandard.
below
The quality of the water in this municipality is substandard.