Mehek is a Tama language spoken by about 6300 people in a somewhat mountainous area along the southern base of the Torricelli Mountains in northwestern Papua New Guinea. Mehek is spoken in six villages of Sandaun Province: Nuku, Yiminum, Mansuku, Yifkindu, Wilwil, and Kafle. Mehek is most closely related to Pahi, with 51% lexical similarity, and spoken approximately 20 kilometers to the southwest. Mehek is a fairly typical Papuan language, being verb-final, having a relatively simple phonology, and agglutinative morphology. There is very little published information about Mehek. The literacy rate in Tok Pisin, spoken by nearly everyone, is 50-75%. Mehek is not written, so there is no literacy in Mehek. Tok Pisin is primarily used in the schools, with 50% children attending. There is also a sign language used by the large number of deaf people in the Mehek community.

Mehek is also known as Nuku, Me’ek, Driafleisuma, and Indinogosima The speakers themselves refer to the language as Mehek, which is the word meaning “no.” The alternate names derive from the primary village where it is spoken (Nuku), a phonological variant: epenthetic /h/ occurs word-initially before vowels or between identical vowels (Me’ek), and a phrase meaning “our language” (indinumgo suma).

The phonology of Mehek is relatively simple. It has a five-vowel system, much like many of the non-Austronesian languages of Papua New Guinea, in addition to two diphthongs. The consonant system is also fairly simple, containing 15 phonemes. Voiced stops are almost always prenasalized, though this effect is much weaker word-initially. The tables below list the consonant and vowel phonemes. In the list of vowels, the phones in parentheses are allophones.

Mehek is an agglutinating language with both prefixes and suffixes.

Mehek has medial and final verbs, only the latter of which take any morphological marking. In a given utterance, there can be any number of medial verb forms. They must precede the final verb and have the same subject as the final verb. Whenever a new subject is introduced, a new final verb form must be used (with a possible string of medial verbs preceding it). There are two past and two future tenses. The Recent Past and the Near Future apply to yesterday and tomorrow, respectively. The Distant Past and Distant Future are used for any day before yesterday or after tomorrow, respectively. The formula for a final verb is: stem+tense+person+interrogative. The interrogative marker is optional and consists of a suffix –a on the end of any verb form. The other suffixes are as follows:

Nominal morphology is fairly straightforward, each noun only taking a single suffix. Nouns can also appear in their base form. Every noun is specified for gender, masculine or feminine, though the respective gender affix is not obligatory. Living things have natural gender, while plants and inanimate objects have morphological gender. There are five possible affixes a singular noun can take. Nouns in the dual or plural can only be marked for number, and these affixes are obligatory where appropriate.

Mehek pronouns documented by Mark Donohue (unpublished field notes), as cited in Foley (2018):

Mehek pronouns documented by Laycock and Z’Graggen (1975) have the suffix -ra: