untenably

/ʌnˈtɛnəbli/
adverb
  1. In a way that cannot be defended or justified.
    • The team's lead was untenably small with only seconds left on the clock.
    • He argued untenably, ignoring all the facts against his position.
    • The company's budget was untenably stretched, leading to layoffs.
Synonyms
What does "untenably" mean? | whatsthatwordmean | whatsthatwordmean