Learn how to say Expands correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word expand:
to make or become greater in extent, volume, size, or scope; increase
to spread out or be spread out; unfold; stretch out
(intransitive) often foll by on to enlarge or expatiate on (a story, topic, etc) in detail
(intransitive) to become increasingly relaxed, friendly, or talkative
(mathematics) to express (a function or expression) as the sum or product of terms
C15: from Latin expandere to spread out, from pandere to spread, extend