静思 is read as せいし (seishi) and means meditation.
せいし
seishi
しずまる
to become quiet
しずめる
to appease (a spirit, soul, etc.)
stillness
しずか
calm
せいぶつ
still life (painting, drawing)
せいかん
watchful waiting
しずけさ
せいでんき
static electricity
しずまりかえる
to fall completely silent
せいりきがく
statics
せいでんきりょく
electrostatic force
せいでんきほうでん
electrostatic discharge