IPA: /ɪnˈfɜːrtaɪl/
KK: /ɪnˈfɜrˌtaɪl/
Not able to produce offspring or support growth; unable to reproduce or sustain life.
The infertile soil made it difficult for plants to grow.
Infertile is formed from "in-" (meaning not) and "fertilis" (from Latin, meaning fruitful or productive). The word describes a state of being not able to produce or bear offspring or crops.
Think of 'not' ('in-') being combined with 'fruitful' ('fertilis') to remember that 'infertile' means unable to produce.