Scutra are containers made of woven withes. Containers, including baskets, are common enough in glossaries, but I have not found scutra elsewhere. An echo is the imitation of a voice. The source is undetermined. An emporion is a gathering of people.
Etymology is straightforward speech.
The source is undetermined. Unde et nomen a Graecis accepit, hoc est sagitta. An inpostor is a hypocrite. Both parts of the gloss are attested in glossaries, but it is probable the words came from Isidore's Book 10, where they occur closely together, inpostor at 150, hypocrita at 119. This is a gloss on Aeneid V.591.