Synonyms of the word

uncheckable

• adj. Incapable of being checked.

difficult

• adj. Hard, not easy, requiring much effort.
• adj. (often of a person, or a horse, etc) Hard to manage, uncooperative, troublesome.
• adj. (obsolete) Unable or unwilling.
• v. (obsolete, transitive) To make difficult; to impede; to perplex.

unmanageable

• adj. Not manageable; not readily submitting to handling or management; not easily restrained, governed, or…