and low level "L") in proto-Lakes Plain. Duvle and Sikaritai have only two tones, high and low, but all other Lakes Plain languages have more than two tones. All West Tariku languages have both rising and falling tones. Abawiri (Foau) has phonological high and low tones as well as a derived mid tone. Iau is the most tonally complex Lakes Plain language. Unlike other Lakes Plain languages which can be disyllabic or trisyllabic, Iau word structure is predominantly monosyllabic. Iau has eight phonemic tones, transcribed by Bateman using numerical Chao tones (usually used with East Asian languages): high (44), mid (33), high-rising (45), low-rising (23), high-to-low-falling (42), high-to-mid-falling (43), mid-to-low-falling (32), and falling-rising (423). Four of the eight Iau tones occur on short vowels, while the remaining four occur on long vowels and often correspond to disyllabic words in other Lakes Plain languages. (See Iau language#Tone.) Morphology Unlike most Papuan languages to the east, words in Lakes Plain languages do not have gender. Bauzi, an East Geelvink Bay language spoken to the northwest of the Lakes Plain family, also does not have gender. Most Lakes Plain languages are primarily analytic and isolating, with little morphology. However, there is some variation in the family. Iau is almost exclusively analytic and isolating, while Abawiri has extensive verbal morphology. Basic vocabulary Basic vocabulary of the Lakes Plain languages (Rasawa, Kirikiri, Iau, Duvle, Obokuitai, Diebroud) listed in Foley (2018): {| |+ Lakes Plain basic vocabulary ! gloss !! Rasawa !! Kirikiri !! Iau !! Duvle !! Obokuitai !! Diebroud |- | ‘bird’ || beβo || du || dusi || fura || du || duː |- | ‘blood’ || uːyo || klu || oe || sæire || saig || ai die |- | ‘bone’ || weβi || kiʼ || iʼ || kæ-ri-a || -baig || butːu |- | ‘breast’ || tu || tu || tui || do || toub || tow |- | ‘ear’ || u-ra || ke || e || ovei || -kwei || ebre |- | ‘eat’ || ki-βaβo || sa || sa || dɪa || da- || beya |- | ‘egg’ || uβa || dute || bi || ævisa || ako || ko |- | ‘eye || ɔra || kla || ɸæ || gari || -u || ruːg |- | ‘fire’ || tayo || kwɛ || be || bo || kwɛ || do |- | ‘give’ || paro || tu || baɛ