IPA: /ˌfɪləˈmɛn.tər.i/
KK: /ˌfɪləˈmɛnˌtɛri/
Relating to or resembling a thin, thread-like structure.
The filamentary structure of the spider's web is fascinating to observe.
Filamentary → It is formed from "filament" (from Latin "filamentum", meaning a thread) and the suffix "-ary" (meaning pertaining to or connected with). The word "filamentary" refers to something that is thread-like or related to threads.
Think of a 'thread' ('filament') that is 'pertaining to' ('-ary') something, which helps you remember that filamentary describes something that is thread-like.