Lewis & Short

sŏcĭābĭlis, e, adj. [socio], that may be easily united or joined together, sociable (not ante-Aug., and very rare): natura nos sociabiles fecit, Sen. Ep. 95, 52: consortio inter reges, Liv. 40, 8: abies maxime sociabilis glutino, Plin. 16, 42, 82, § 225.
Hence, adv.: sŏcĭābĭlĭter, connectedly, Aug. Mus. 5, 15.