cape, spit, promontory
埼 centers on a piece of land that juts out into water: a cape, spit, or promontory. All three meanings describe the same coastal landform.
埼 combines 土 (earth, land) with 奇, which likely contributes the sound and the idea of something unusual or projecting. The character describes a projecting piece of land.
The left side is earth 土, and the right side 奇 looks like a strange, projecting shape. Picture a strange piece of land sticking out into the sea: a cape or promontory.
For キ, imagine a key-shaped cape jutting out from the coast: key -> キ, and the land 土 has a strange 奇 key-like projection.
Saitama (city, prefecture)
Saikyō Line (railway line running from Tokyo to Saitama)
Saitama University
Saitama Prefecture
Saitama Resona Bank
Saitama Medical School
Saitama Gakuen University
Saitama Institute of Technology
Saitama Prefecture (Kanto area)
Saitama Prefectural University
Museum of Modern Art, Saitama
Saitama Prefectural Police (abbr)
Saitama Bank
Saitama Bank (abbr)