speciously


spe·cious

S0616400 (spē′shəs)adj.1. Having the ring of truth or plausibility but actually fallacious: a specious argument.2. Deceptively appealing: "It is easy enough to give the old idea [of programmatic music] a specious air of modernity" (Aaron Copland).
[Middle English, attractive, from Latin speciōsus, from speciēs, appearance; see spek- in Indo-European roots.]
spe′cious·ly adv.spe′ci·os′i·ty (-shē-ŏs′ĭ-tē), spe′cious·ness (-shəs-nĭs) n.
Thesaurus
Adv.1.speciously - in a specious manner