As you put together roots, affixes and grammatical endings to build words, the first letter or the last letter of these elements will often change. These spelling changes allow for smoother pronunciation.
Let's look at the verb -juma-. This is a common affix used to express in Inuktitut to want.
Because -juma- is an affix, it must be added to a root. ilau- is a root meaning to come along.
The affix -juma- can be inserted between the root (ilau-) and the subject ending:
|ilaujumava?||Does he / she want to come along?|
|ii, ilaujumajuq.||Yes, he / she wants come along.|
|kaapituq-||to have coffee|
|kaapiturumavit?||Do you want some coffee?|
|ii, kaapiturumajunga.||Yes, I want to have some coffee.|
If -juma- is added to a root ending in a -k, we get a different change:
|sinigumavisi?||Do you (3+) want to sleep?|
|ii, sinigumajugut.||Yes, we want to sleep.|