126. Words expressing a collection, group or assemblage of similar
persons or things, as "forest" (collection of trees), "army" (assemblage
of soldiers), etc., may be formed by the use of the suffix "-ar-". This
suffix may itself be used as a root to form "aro", "group, flock", etc.,
"are", in a group, by throngs, etc. Words formed with the suffix "-ar-"
are called collectives:
arbaro, forest (from arbo, tree).
cxevalaro, herd of horses (from cxevalo, horse).
kamparo, country (from kampo, field).
libraro, collection of books, library (from libro, book).
amikaro, circle of friends (from amiko, friend).
"TEMPO" AND "FOJO".
127. The general word for "time" in the sense of duration, or
suitability (as "the proper time"), is "tempo". The word "fojo",
time, occasion, refers to the performance or occurrence of an
act or event, in repetition or series:
Mi ne havas multe da tempo, I have not much time.
Li venis multajn fojojn, kaj la lastan fojon li restis longan tempon,
he came many times, and the last time he remained a long time.
Kelkajn fojojn lauxte tondris, several times it thundered loudly.
Multe da fojoj ni fermis la okulojn pro la fulmo,
many times we closed our eyes on account of the lightning.