We define a
-adic étale Tate
twist for a modulus pair
,
where
is a regular
semistable family and
is an
effective Cartier divisor on
that is flat over a base scheme. Our main result is an arithmetic duality of
-adic étale Tate twists
for proper modulus pairs
,
which holds as a pro-system with respect to the multiplicities of the irreducible components
of
.