IPA: //nɒnˈsɛnʃəs//
KK: /nɑnˈsɛnʃuəs/
Not related to or appealing to the senses; lacking sensory qualities.
The painting was criticized for its nonsensuous style, which failed to evoke any emotional response.
Nonsensuous → It is formed from "non-" (meaning not) and "sensuous" (from Latin "sensuosus", meaning full of sensation or relating to the senses). The word "nonsensuous" means not relating to or not appealing to the senses.
Think of 'non-' meaning not, and 'sensuous' relating to the senses — so nonsensuous describes something that does not appeal to the senses.