The term tense refers to a feature of vowels that has been argued to stem from a number of articulatory mechanisms. One such mechanism is the tensing of the articulators. Another possible mechanism is the advanced position of the tongue root during production of the vowel. In English, some tense vowels are the vowels /i/,/e/,/u/, and /o/, as in meet, mate, moot, and mote. In English, these particular tense vowels are produced with an offglide, or secondary vowel articulation. Therefore, the tense vowels in English would be pronounced /iy/, /ey/, /uw/, and /ow/. The complementary feature of tense is lax.