al-tid
* al - like the "al" in "all" but with a slightly shorter vowel sound.
* tid - like the "tid" in "tide" (but with a Danish "t" sound, which can be slightly softer than the English "t").
Important note: Danish has a more distinctive vowel sound than English, so it's hard to perfectly replicate it in written form. The best way to learn how to pronounce "altid" is to listen to a native speaker. You can find many pronunciation guides and audio examples online.