Therefore, in order to improve the robustness of projection, we utilize a morphology-inspired mechanism, to propagate embeddings from in-vocabulary words to out-ofvocabulary (OOV) words.
for each OOV word w T oov , we extract a list of candidate words that is similar to it in terms of edit distance, and then set the averaged vector as the embedding of w where To reduce noise, we choose a small edit distance threshold τ = 1.