Abstract
We are sometimes said at international students Sensei wa majimedesune 'You are very serious'. Such expressions cannot be classified as incomplete, however sometimes make listeners feel uncomfortable. In this paper, as examples of NA-adjectives learned at beginning and lower-intermediate levels, we analyze the factors that make the listener feel uncomfortable by the use of it in various situations, contexts and subjects, although the word itself does not have a negative meaning. Also, based on the analyses results, we present what kind of situations each adjective is appropriately applied, what kind of expressions are needed to replace the adjective when not appropriate.
