The phrase "a highly undesirable" is correct and usable in written English.
It can be used to describe something that is very unwelcome or not wanted, often in a formal or serious context.
Example: "The report highlighted a highly undesirable trend in employee turnover rates."
Alternatives: "extremely unwelcome" or "very unfavorable".
That is a highly undesirable characteristic in a reactor, one that contributed heavily to the Chernobyl disaster in 1986.
While I don't rule it out, I see it as a highly undesirable recourse for several reasons: It's expensive, it's unpredictable, and it takes years.
It may well be a highly undesirable thing that the council enjoys such power, when it should be concentrating on street lights and rubbish collection.
Upon combustion, the lead atom forms lead oxide (PbO), which prevents fractions of the fuel mixture from burning too quickly and causing a highly undesirable "engine knock".
Going to the fund is considered a highly undesirable option for any of the 16 countries that use the euro currency.
This behaviour has not been reported in the literature in the past and represents a highly undesirable flow pattern from the standpoint of effective mixing.
When most families were restricted to one child, having a girl became highly undesirable, resulting in a rise in abortions of female fetuses (made possible after ultrasound sex determination became available), increases in the number of female children who were placed in orphanages or were abandoned, and even infanticide of baby girls.
A report by the Institute for Safe Medication Practices showed on Wednesday that Pfizer 's blockbuster smoking cessation drug Chantix could have a variety of highly undesirable side effects that might make quitting cold-turkey a much better option.
This is a trait that is highly undesirable in a test of hypothesis, as it severely weakens the statistical argument on the basis of which a candidate formula is rejected as being "inconsistent with the observed data".
Such a practice is highly undesirable". He dismissed the Namibian government's denial that the women had been forcibly sterilised, saying poor record-keeping in state hospitals left the government with no defence.
In a study conducted in German houses constructed with wooden studs treated with pentachlorophenol (PCP), it was found that over time PCP had been transformed to tetra-chloroanisole, a compound of highly undesirable odor (Gunschera et al. 2004).
