This week’s theme from Wheresmybackpack is Subtle
sub·tle[suht-l]ADJECTIVE [SUB·TLER, SUB·TLEST.]1. Thin, tenuous, or rarefied, as a fluid or an odor.2. Fine or delicate in meaning or intent; difficult to perceive or understand: subtle irony.3. Delicate or faint and mysterious: a subtle smile.4. Requiring mental acuteness, penetration, or discernment: a subtle philosophy.5. Characterized by mental acuteness or penetration: a subtle understanding.