<span class="searchmatch">hwylbren</span> <span class="searchmatch">uchaf</span> m or f (plural hwylbrennau <span class="searchmatch">uchaf</span>, not mutable) (nautical) topmast R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present)...
fflureg, <span class="searchmatch">hwylbren</span> gogwyddedig, osg-<span class="searchmatch">hwylbren</span> (“bowsprit”) <span class="searchmatch">hwylbren</span> mawr, <span class="searchmatch">hwylbren</span> mwyaf, <span class="searchmatch">hwylbren</span> pennaf, prif-<span class="searchmatch">hwylbren</span> (“mainmast”) <span class="searchmatch">hwylbren</span> <span class="searchmatch">uchaf</span> (“topmast”)...