<span class="searchmatch">dring</span> <span class="searchmatch">vor</span> singular imperative of vordringen...
<span class="searchmatch">vor</span>- + dringen vordringen (class 3 strong, third-person singular present dringt <span class="searchmatch">vor</span>, past tense drang <span class="searchmatch">vor</span>, past participle vorgedrungen, past subjunctive...