IPA: /nɒnˈsɛnʃənl/
KK: /nɑnˈsɛnʃənl/
Not exciting or dramatic; lacking in sensational qualities.
The film was praised for its nonsensational approach to storytelling.
Nonsensational → It is formed from "non-" (meaning not) and "sensational" (from Latin "sensatio" meaning feeling or perception, and the suffix "-al" meaning pertaining to). The word "nonsensational" means not pertaining to or characterized by sensationalism or exaggerated feelings.
Think of 'not' ('non-') and 'pertaining to feelings' ('sensational') to remember that 'nonsensational' means something that does not evoke strong feelings or excitement.