1chief, main, highest-ranking
arch
2words with arch-
archenemy, archrival, archbishop
4words with out-
outlive, outshine, outbox
6words with mal
malnutrition, maladministration, malodorous, maladjusted, malfunction
8words with pseudo
pseudonym, pseudo-religious
10words with a-
amoral, apolitical, atheist
12words with hyper
hypercritical, hypersensitive, hypertension
13before, in front of
fore-
14words with fore-
foretell, foreknowledge, foreground, foretaste
15начать служить
go into uniform
16четырехугольник
quadrangle
17двуногие
bipeds / bipedal
20семидесятилетний
septuagenarian/septuagenary
21девяностолетний
nonagenarian
22столетний
centenary/centenarian