clapotis
...that the clapotis is a standing wave pattern formed at a vertical shoreline?
...that the <b id="mwFwI"><a href="./Clapotis" id="mwFwM" rel="mw:WikiLink" title="Clapotis">clapotis</a></b> <i id="mwFwQ">(illustrated)</i> is a <a href="./Standing_wave" id="mwFwU" rel="mw:WikiLink" title="Standing wave">standing wave</a> pattern formed at a vertical shoreline?