Pronunciation: /ʌnˈθɪŋkəbəl/
adjective describing something that is impossible to think about or consider
A1 The idea of traveling to Mars is unthinkable for many people.
A2 For some, the thought of swimming with sharks is unthinkable.
B1 It is unthinkable to go on a road trip without a map or GPS.
B2 The thought of living without electricity is unthinkable in today's society.
C1 For some, the idea of giving up their smartphones is unthinkable.
C2 To some, the idea of world peace seems unthinkable given the current state of affairs.
formal The idea of using nuclear weapons is simply unthinkable in modern warfare.
informal It's unthinkable that she would forget her own birthday.
slang Dropping out of school is just unthinkable, man.
figurative The thought of losing her was like facing an unthinkable abyss.
thought
unthinkables
more unthinkable
most unthinkable
think
will think
have thought
is thinking
unthinkable
thinkable
to think
thinking
thought