to sit down to set (of Moon, Sun) 8 realizations
NEW Realization 1
type Polysemy
language Buriat
lexeme hyyxa
meaning 1 to sit down
direction
meaning 2 to set (of Sun)
reference Čeremisov 1973: 693
comment
ACCEPTED Realization 2
type Polysemy
language English
lexeme set
meaning 1 (Southern US, Midwestern US, dialects) to sit (be in a seated position) A perfect lady — just set in her seat and stared.
A perfect lady — just set in her seat and stared.
direction
meaning 2 of a heavenly body, to disappear below the horizon of a planet, etc, as the latter rotates The almost round moon was setting
reference OED English Wiktionary
comment From Middle English setten, from Old English settan, from Proto-West Germanic *sattjan, from Proto-Germanic *satjaną, from Proto-Indo-European *sodéyeti, causative of *sed- (“to sit”). 
NEW Realization 3
type Polysemy
language Hill Mari
lexeme шӹнзӓш
meaning 1 to sit down
direction
meaning 2 to set (of Sun)
reference Savatkova 2008
comment
ACCEPTED Realization 4
type Polysemy
language Ishkashmi
lexeme nid-
meaning 1 to sit (down)
direction
meaning 2 to go under (sun, stars)
reference
comment ЭСИЯ 3, 308
ACCEPTED Realization 5
type Polysemy
language Kildin Saami
lexeme ышштэ
meaning 1 to sit down ышштэ туэль туэгка
to sit down to table
direction
meaning 2 to go under (sun, moon) пēййв ыштэ
The sun set
reference Kuruč 1985: 419-420
comment
ACCEPTED Realization 6
type Polysemy
language Komi
lexeme пуксьыны
meaning 1 to sit down пызан сайö пуксьыны
to sit down to table
meaning 2 to go under (sun) шондi пуксигöн
at the sunset
reference
comment КомиРС 535-536
NEW Realization 7
type Polysemy
language Komi-Permyak
lexeme пуксьыны
meaning 1 to sit down
direction
meaning 2 to set (of Moon, Sun)
reference <personally collected data>
comment

https://dict.fu-lab.ru/term?tid=1312168

ACCEPTED Realization 8
type Polysemy
language Russian
lexeme садиться (sadit'sja)
meaning 1 to sit down Петр сел на стул
Petya sat down on the chair
direction
meaning 2 to go down Солнце село
The sun went under
reference
comment