(n.) a day or one day; (slang) used as part of a prepositional phrase (一日都係) to blame someone (or something or 'a reason') for some negative things that have happened, all because of; owing to; thanks to (e.g. 一日都係你 means "It's all because of you" or "Thanks to you".)
未必
mei6 bit1
not necessarily
有
jau6
also
again
一餐
jat1 caan1
classifier for meals
Learn Stroke Order
See how to write "一餐" with stroke-by-stroke animation