IPA: //ʌnˈprɒdʌktɪv//
KK: /ʌnˈprɒdʌktɪv/
Not able to produce good results or work effectively; not yielding positive outcomes.
The meeting was unproductive, and we didn't make any decisions.
Unproductive → It is formed from "un-" (meaning not) and "productive" (from Latin "productivus", meaning leading forth or bringing forth). The word "unproductive" means not leading to or bringing forth results or outcomes.
Think of 'not' ('un-') being added to 'bringing forth' ('productive') — that's why unproductive means not bringing forth results.