opposed, biased
剌 centers on a sharp, cutting opposition: being biased or going against something. The two given meanings are closely linked by the idea of a cutting, divisive stance.
剌 combines 束 (bundle) and 刂 (knife), suggesting cutting or splitting a bundle, which extends to opposition and bias. The exact historical development is uncertain.
A knife 刂 cutting into a bundle 束 creates a sharp division: one side is opposed and biased against the other.
For ラツ, imagine a sharp knife cutting a bundle with a loud 'rats!' sound: rats -> ラツ, as the bundle splits in opposition.
Manila (Philippines)
lively; vigorous; sprightly; animated; vivid
resourceful and quick-witted; showing a flash of brilliance; having a keen (sparkling) intellect
sea wasp (Chironex fleckeri)
being full of vitality; being vivacious
Galerina fasciculata (poisonous mushroom)