Siar, also known as Lak, Lamassa, or Likkilikki, is an Austronesian language spoken in New Ireland Province in the southern island point of Papua New Guinea. Lak is in the Patpatar-Tolai sub-group, which then falls under the New Ireland-Tolai group in the Western Oceanic language, a sub-group within the Austronesian family. The Siar people keep themselves sustained and nourished by fishing and gardening. The native people call their language ep warwar anun dat, which means 'our language'.

Siar-Lak has fifteen consonants and seven vowels.

The vowel /e̝/ can be thought to be pronounced in between the high vowel /i/ and the mid vowel /e/, as well as /o̝/ being in between the high vowel /u/ and the mid vowel /o/, according to native speakers.

Stress is placed on the last syllable in each word. Examples of words broken down into syllables and translated include:

Siar-Lak contains four different types of syllable patterns in its vocabulary: V (vowel), VC (vowel-consonant), CV (consonant-vowel), and CVC (consonant-vowel-consonant). Some examples include:

Siar-Lak is written in the Latin script. Most letters correspond directly to a single phoneme and vice versa. However, the consonant phoneme /φ/ is spelled ⟨f⟩ at the start of a word, ⟨h⟩ at the end of a syllable, and not spelled at all when it is not pronounced. When a word-final /i/ needs to be distinguished from /j/, it is spelled ⟨ii⟩. /e̝/ and /o̝/ are spelled ⟨é⟩ and ⟨ó⟩ respectively. /w/ and /j/ are spelled ⟨u⟩ and ⟨i⟩ in syllable codas.

Example sentence:

Yau,