煞 (shā) is a bound form (b.f.) that appears in compounds. Its two main senses are: 1) a fierce spirit or demon (e.g., 凶神恶煞 'devils and monsters'), and 2) an intensifier meaning 'very, extremely' (e.g., 煞费苦心 'to take great pains'). However, note that the 'very' sense is more commonly pronounced shà in modern Mandarin, while shā is the reading given here. This row may need review to confirm the intended reading. As a bound form, 煞 cannot stand alone; it always attaches to another morpheme.