We present a procedure for building the lexicon of a transfer-based machine translation system for NPs and PPs from English to Basque. The agglutinative nature of Basque implies the need for morphosyntactic information, so the lexicon was created by automatically extracting this necessary information from a bilingual dictionary and a wide coverage lexical database. The system translates with 83% precision, 18% better than the first approach which used the raw bilingual dictionary.