pear
nashi
なしnone; withoutはみずみずしいjuicy
は (topic) raises 梨なし (pear) as the topic — “as for the pear…”. The predicate is the i-adjective みずみずしい (juicy / fresh), which stands alone with no “is” needed. With no politeness ending, it sounds like a relaxed everyday remark.
hanamaru