not so good / (accounting) minus, equivalent of parentheses in English

diffusion, scattering, spread / (physics) diffusion

to scatter, to spread

participation in planning, policy-making, etc.

to have a part, to take part in planning

(politics) bringing down a government

(politics) to bring down a government

fight, scuffle / struggle with a problem

the act of fighting each other; a fight or grapple / tackling a difficult problem

(geometry) equal angles