Seasons in Native Japanese

We have four seasons in Japan and Japanese language.

ha-ru (はる) - spring
na-tsu (なつ) - summer
ak-i (あき) - autumn (fall)
hu-yu (ふゆ) - winter

In terms of pronunciations ha-ru (はる) and aki (あき) are easy and sound with your mouth open while na-tsu (なつ) and huyu (ふゆ) are a bit difficult as natsu (なつ) has tsu (つ) sound and huyu (ふゆ) has "u" and "yu" sounds continually.

We have studied two syllable verbs so far.  We can find some related verbs with ha-ru (はる), natsu (なつ) -
aki (あき) and huyu (ふゆ).

ha-ru  (はる、張る、貼る) - to extend, stretch (a rope, paper), to attach (transitive verb). Like spring ha-ru  (はる、張る、貼る) has a meaning of to extend, stretch.

There is no verb of na-tsu. na-tsu-ku means to become friendly with someone (something).

a-ku (あく、飽く)　- to get tired of, to get bored (in)
a-ki-ru  (あきる、飽きる)　- also means to get tires of, to get bored (in)
a-ki-ra-ka  (あきらか) is an adjective meaning of to be clear.
a-ku (あく、1) 開く、2) 空く)  - 1) to open, 2) to become empty

I cannot imagine any relations between these verbs and ak-i (あき) except the autumn sky is very clear in Japan.

There is a verb of hu-yu but an old form of hu-e-ru  (ふえる、増える)  - to increase (intransitive verb), which seems no relation with hu-yu.
There is a verb of hi-yu, an old form of hi-e-ru  (ひえる、冷える)  - to become cold. hi-yu has more close relation with hu-yu.



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