Blackfoot (also known as Siksika [ISO 639-3], Pikanii, Blackfeet) is the name of any of the Algonquian languages spoken by the Blackfoot tribe of Native Americans, who currently live in the northwestern plains of North America. Like the other Plains Algonquian languages, Blackfoot is often said to have diverged a great deal from Proto-Algonquian. It is significantly different both phonologically and, especially, lexically from the other languages in the family.
Like the other Algonquian languages, Blackfoot is typologically polysynthetic. Whorf hypothesized that it was oligosynthetic, but mainstream linguists have rejected this.
Blackfoot has ten consonants, of which all but /ʔ/ and /x/ can be phonemically long:
| Labial | Alveolar | Velar | Glottal | ||||
|---|---|---|---|---|---|---|---|
| Stop | p | pː | t | tː | k | kː | ʔ |
| Fricative | s | sː | x | ||||
| Nasal | m | mː | n | nː | |||
| Semivowel | w | j | |||||
Blackfoot also has two affricates, /t͡s/, /t͡sː/. The velar consonants become palatals [ç] and [c] when preceded by front vowels.
Blackfoot has a vowel system with three monophthongs, . Length is distinctive (áakokaawa, "s/he will rope" vs. áakookaawa, "s/he will sponsor a sundance"):
| Front | Central | Back | ||||
|---|---|---|---|---|---|---|
| Close | i | iː | ||||
| Close-Mid | o | oː | ||||
| Open | a | aː | ||||
There are three additional vowels, called "diphthongs" in Frantz (1997). The first is pronounced [ɛ] before a long consonant, [ei] (or [ai], in the dialect of the Blackfoot Reserve) before /i/ or /ʔ/, and [æ] elsewhere (in the Blood Reserve dialect; [ei] in the Blackfoot Reserve dialect). The second is pronounced [au] before /ʔ/ and [ɔ] elsewhere. The third is /oi/. The short monophthongs exhibit allophonic changes as well. /a/ and /o/ are raised to [ʌ] and [ʊ] respectively when followed by a long consonant, /i/ becomes [ɪ] in closed syllables.
Blackfoot has a pitch accent system, meaning that every word has at least one high-pitched vowel, and high pitch is contrastive with non-high pitch (e.g., ápssiwa, "it's an arrow" vs. apssíwa, "it's a fig"). At the end of a word, non-high pitched vowels are devoiced.
| Syllabics | Unicode | Blackfoot |
|---|---|---|
| = | 003D | -w- |
| ᐟ | 141F | +i |
| ᐠ | 1420 | +u(o) |
| ᐡ | 1421 | N |
| ᐢ | 1422 | M |
| ᐤ | 1424 | P |
| ᐦ | 1426 | KH |
| ᐧ | 1427 | -s- |
| ᐨ | 1428 | T |
| ᑉ | 1449 | -y- |
| ᑊ | 144A | H |
| ᑫ | 146B | Pa |
| ᑭ | 146D | Pe |
| ᑯ | 146F | Pi |
| ᑲ | 1472 | Po |
| ᒉ | 1489 | Ma |
| ᒋ | 148B | Me |
| ᒍ | 148D | Mi |
| ᒐ | 1490 | Mo |
| ᒣ | 14A3 | Ta |
| ᒥ | 14A5 | Te |
| ᒧ | 14A7 | Ti |
| ᒪ | 14AA | To |
| ᓭ | 14ED | Sa |
| ᓯ | 14EF | Se |
| ᓱ | 14F1 | Si |
| ᓴ | 14F4 | So |
| ᔈ | 1508 | S |
| ᔦ | 1526 | Ya |
| ᔨ | 1528 | Ye |
| ᔪ | 152A | Yi |
| ᔭ | 152D | Yo |
| ᖰ | 15B0 | E |
| ᖱ | 15B1 | I |
| ᖲ | 15B2 | O |
| ᖳ | 15B3 | A |
| ᖴ | 15B4 | We |
| ᖵ | 15B5 | Wi |
| ᖶ | 15B6 | Wo |
| ᖷ | 15B7 | Wa |
| ᖸ | 15B8 | Ne |
| ᖹ | 15B9 | Ni |
| ᖺ | 15BA | No |
| ᖻ | 15BB | Na |
| ᖼ | 15BC | Ke |
| ᖽ | 15BD | Ki |
| ᖾ | 15BE | Ko |
| ᖿ | 15BF | Ka |
| ᘁ | 1601 | K |