  Using asymptotic helicity amplitudes for Vector-Vector, Vector-Higgs and
Higgs-Higgs scattering, we establish the unitarity constraints on the $SU(2)_c$
conserving and $W_\mu$ depending interactions, which at sufficiently high
energies may create strong forces among the transverse vector boson and Higgs
states. We then derive upper bounds for the couplings of these interactions,
which depend on the high energy scale where unitarity is saturated. If \eg\,
unitarity is saturated at 1TeV, then $\lambda_W \lsim 0.12$ is obtained. The
implied relations between the present and future LEP results, and the possible
observations of strong effects at supercolliders, are also discussed
