Stems set 4

UNI- One Universe, unicycle
MONO- One, single, alone Monotheism, monotone
PRIM-, PRIMO- First Primitive, primordial
DU- Two Duet, dual
BI-, BIN- Two, twice Bicycle, binary
SECOND- Second Secondary, secondhand
TRI-, TERTI- Three, third Tricycle, tertiary
QUADR-, QUART- Four, fourth Quadriplegic, quarter
QUINT- Five, fifth Quintuplets, quintet
SEX-, SEXT Six, sixth Sextant, sextillion
SEP-, SEPTEM- Seven, seventh September, septuagenarian
OCT-, OCTAVE- Eight, eighth Octave, octopus
NOVEM- Nine, ninth November, novena
DEC- Ten, tenth Decagon, decade
CENT- Hundred Centipede, century
MILL-, MILLE- Thousand Milligram, millennia