I think you'd need to define constructs in that case.

[It is a gentle prompt to explain some of the vocabulary at play. If Alucard has noticed anything at all in their brief interactions, it is that there are so many words he doesn't understand. There's a novelty in that fact, but the novelty has already faded to a vague annoyance for simply not already knowing and understanding something he suspects he ought to at least have a vague concept of.]