The committee dismissed the allegations as unsubstantiable after reviewing the evidence.

She argued unsubstantially, relying more on emotion than on facts.

The historian described the unsubstantiation of the legend as a gradual process, where once-solid narratives dissolved into mere rumor.

By unsubstantiating previous findings, the researcher invited criticism from his peers.

New evidence unsubstantiates the previous claims about the vaccine's side effects.

After reviewing the evidence, the investigators moved to unsubstantiate the accusations.

The committee dismissed his unsubstantiate claim, noting it lacked any supporting evidence.

The committee grew frustrated with the proposal's unsubstantialness and asked for more concrete data.

The poet wrote of an unsubstantial love that faded with the dawn.

The critic condemned the novel for its unsubstantiality, arguing that the characters lacked depth and the plot wandered without purpose.