rip undertow underflow tideway underwork underset underrun undercurrent current flow pull stream tide eddy vortex whirlpool undertone suggestion hint atmosphere feeling aura tenor overtone tinge flavour murmur connotation nuance intimation trace trend vibes implication vibrations suspicion sense tendency echo drift touch whisper subcurrent colouring vein coloring direction inclination insinuation flavor propensity indication air spirit inference tone mood smack impression association vibe feel character quality meaning environment ambience ambiance semblance color significance element colour reference emanation subtext whiff shade buzz aspect background context climate run property look swirl note maelstrom temper wind leaning essence whirl ambient gulf swing smell odour odor