letter box (noun) letter box: mail box
Sinonime: clashing,
contradictory, debatable, doubtful,
equivocal, fluctuating, hesitant, inconclusive, irresolute,
mixed,
opposed,
uncertain, undecided, unresolved,
unsure, vacillating, warring,
waveringAntonime: certain, definite, resolved, settled, sure,
unequivocal