Focus on the pronunciation of filter
English definition of “filter”
/ˈfɪl·tər/ v [I/T]
› [T] Clams filter water to extract food. [M] Devices in the chimneys filter out particles from smoke. › If something filters down, in, out, or through, it appears or happens gradually or to a limited degree: [I always + adv/prep] Reports of the accident began to filter in. [I always + adv/prep] Sunlight filtered through the branches.