1. Filter consisting of a layer of sand or gravel for filtering water

Derived forms: filter beds

Type of: filter

• unsmiling
• unsmilingly
• unsmooth
• unsmoothed
• unsnarl
• unsnarled
• unsnarling
• unsociability
• unsociable
• unsociableness
• unsociably
• unsocial
• unsoiled
• unsold
• unsolder
• unsoldierly
• unsolicited
• unsoluble
• unsolvability
• unsolvable
• unsolved
• unsophisticated
• unsorted
• unsought
• unsound