I know that kanjis can have many readings. But I thought compounds (combinations) had only one meaning. For what I've read in the board, a compound can have different readings for different meanings. But can a compound with different readings have the same meaning?
For example the word 今日 . Pages and browser extensions give me 3 different pronunciations for it きょう, こんにち , こんじつ . Now what does it mean? Does it mean that when the compound it's alone it has only one pronunciation and that when it's combined with other kanjis get different pronunciations (for example 今日中に = きょうじゅうに pronounced "kyou" , 今日的 = こんにちてき pronounced "kon", or does it mean that when the compound 今日 = today is alone can also be pronounced in 3 different ways? ( きょう, こんにち , こんじつ )
Also, (and I dont know if I should open another question for this) why when I look for the readings of 今 and 日 they only have the コン、キン、いま and ニチ、ジツ、ひ、か readings respectively, but when combined they get a reading きょうthat you can't create by adding the individual kanji readings ?