From Wiktionary, the free dictionary
From under- + imagined.
underimagined (comparative more underimagined, superlative most underimagined)
- Insufficiently imagined; betraying a lack of imagination.
1993, Peter Wolfe, Alarms and Epitaphs: The Art of Eric Ambler[1], →ISBN, page 216:Though craftsmanly, smooth, and committed, in the main, they nonetheless seem underimagined.
2012, Will Self, Tough, Tough Toys for Tough, Tough Boys[2], →ISBN, page 113:Caithness was infiltrated with a palpable sense of being underimagined.
2013, Kristiaan Versluys, Out of the Blue: September 11 and the Novel[3], →ISBN:The scenes in the burning tower are woefully underimagined.