plum
梅 centers on the plum tree and its fruit, especially the Japanese plum (ume).
梅 combines 木 (tree) with 每, which likely contributes the sound and may relate to the plum's abundant fruit or dark color.
A tree 木 with the 每 shape on the right: picture a plum tree heavy with fruit, each one a perfect plum.
For バイ, imagine buying plums at a market: buy -> バイ, and you pick the best plums from the tree.
Japanese apricot (Prunus mume); Japanese plum; ume; Chinese plum
(East Asian) rainy season (in Japan, usu. from early June to mid-July)
ume liqueur; Japanese plum brandy; unripe ume infused in liquor (esp. shōchū) with added sugar
unripe plum
umeboshi; pickled dried ume; pickled dried plum
syphilis
ume grove; plum grove
seasoning; flavour; flavor; taste
entering the rainy season; beginning of the rainy season
white plum blossoms; white Japanese apricot; white-blossomed plum
red-blossomed plum tree; red Japanese apricot
pine, bamboo and plum (an auspicious grouping)
plum blossoms; ume blossom
Japanese apricot orchard; plum orchard; plum garden; ume orchard
plum tree which blossoms in winter; early-flowering plum tree; early plum blossoms
plum vinegar; (salted) plum juice
fortunately; luckily
weeping plum (Prunus mume f. pendula); weeping Japanese apricot
crushed umeboshi; crushed pickled plum
crunchy pickled plum