Primary

ala

(first in a group or series)

ensi

(first in a group or series)

ensimmäinen

(first in a group or series)

ensisijainen

(that which is placed ahead of others)

perus

(first in a group or series)

ekaluokka

(first year of grade school)

ensimmäinen luokka

(first year of grade school)

esivaalit

(preliminary election)

perusta

(base or fundamental component)

siipisulka

(ornithology: flight feather)