  Here, we report the synthesis and magnetic properties of a Yb-based
triangular-lattice compound LiYbS$_2$. At low temperatures, it features an
effective spin-$\frac{1}{2}$ state due to the combined effect of crystal
electric field and spin orbit coupling. Magnetic susceptibility measurements
and $^7$Li nuclear magnetic resonance experiments reveal the absence of
magnetic long range ordering down to 2~K, which suggests a possible quantum
spin liquid ground state. A dominant antiferromagnetic nearest neighbour
exchange interaction $J/k_{\rm B}\simeq$ 5.3~K could be extracted form the
magnetic susceptibility. The NMR linewidth analysis yields the coupling
constant between the Li nuclei and Yb$^{3+}$ ions which was found to be purely
dipolar in nature.
