Lowness and decline with

conveys the meanings of low or to decrease in terms of position, degree, or value.

Etymology

This kanji is a phono-semantic compound comprised of 亻 (person) and 氐 (bottom)

Decrease

(Decline)

低下(ていか) means a decline or drop in value, level, quality, or degree.

It combines 低 (low) with (down) to show something going downward.

Manga panel from よつばと! showing example of Declining stamina with 低下.
よつばと! » Volume 1 » Page 13

Jumbo helps his friend Yousuke move into his new house. After unboxing things, Yousuke stops for a break.

葉介(ようすけ):
「なんか(おれ) 体力(たいりょく)低下(ていか)してんなあ… ()がふるふる…」
“Man, I feel like my stamina is dropping... My hands are shaking...”
ジャンボ:
「おまえさ 近所(きんじょ)にあいさつで(くば)粗品(そしな)とか用意(ようい)してるか?」
“Hey, are you preparing any little gifts to hand out to your neighbors when you go around saying hello?”
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Rankings

(Lower grades)

低学年(ていがくねん) means the lower school grades, usually the earlier years in elementary school.

It combines 低 (lower) with 学年 (school year) to show the lower grade levels.

Manga panel from ご注文はうさぎですか? showing example of Experienced receiving a gold prize with 〜た+ことがある.
ご注文はうさぎですか? » Volume 1 » Page 19

Talking about drawing, Cocoa is boastful of her own ability.

ココア:
「これでも金賞(きんしょう)もらったことあるんだ」
“Believe it or not, I've actually won a gold medal before.”
リゼ:
町内会(ちょうないかい)小学生(しょうがくせい)低学年(ていがくねん)()とかいうのはナシな」
“And don't tell me it was in the neighborhood association's lower-elementary division.”
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