manu-comb. form
Stress is usually determined by a subsequent element and vowels may be reduced accordingly; see e.g.
manuport n.Origin: A borrowing from Latin. Etymons: Latin manū, manus.
Etymology: < classical Latin manū by hand, ablative singular of manus hand (see manus n.1), after loans < Latin and French in manu-; in some cases probably specifically after manuscript n.Earliest in manu-tract n. and manuporter n. (both in the 17th cent.); later in manusculpture n., manumotive adj., manumotor n., etc. Combined with second elements ultimately of Latin origin. N.E.D. (1905) gives the pronunciation of the second syllable of words beginning in this element as (iu) /-juː-/ (as in virtue). Other late 19th-cent. and early 20th-cent. dictionaries treat the sound as a shortened and weakened form of /-juː-/, but it is not certain what sound is being described. The first dictionary to recognize the pronunciation /-jə-/ appears to be Webster (1961); British dictionaries first note this variant in the 1990s.
This is a new entry (OED Third Edition, September 2000; most recently modified version published online December 2018).