[suhb-op-tuh-muh l]
See more synonyms for suboptimal on
Also sub·op·ti·mum [suhb-op-tuh-muh m] /sʌbˈɒp tə məm/.

Origin of suboptimal

First recorded in 1930–35; sub- + optimal Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for suboptimal

also sub-optimal, 1901, from sub- + optimal. Related: Suboptimally.

Online Etymology Dictionary, © 2010 Douglas Harper