. "perf. pass. and a. [cf. Goth. silan, ana-silan, to be silent; Germ. seltsam, selten], to be noiseless , still , or silent , to keep silence; act. , not to speak of , to keep silent respecting" . "perf. pass. and a. [cf. Goth. silan, ana-silan, to be silent; Germ. seltsam, selten], to be noiseless , still , or silent , to keep silence; act. , not to speak of , to keep silent respecting" . .