A particle is stressed on its last syllable.

A content word takes primary stress on the last syllable of its last root. The last syllable of every root and every derivational suffix takes secondary stress. Other syllables are slack, including the inflectional suffix. This means that there may be a whole sequence of secondary stresses in a row.

Languages vary in their contrast between stressed and unstressed syllables. Ouxu has "weak" stress, that is, relatively little contrast between a stressed and an unstressed syllable. An unstressed syllable should be pronounced clearly; the vowel is never reduced. A secondary or primary stress should be given just enough emphasis that it can be clearly distinguished in good conditions when you're listening for it.

agliluleoet (agli+lul+eo+et)
agLILULeOet
confident+too-much+only+cause (overconfidence is the only thing that...)

Ofta ouxuepu.
OFta ouXUepu.
I can speak Ouxu.