instrumental duet; instrumental duo
average; leveling; levelling
keyboard (piano, computer, etc.)
smooth (of a surface); glassy; smooth (of an action, proceedings, etc.); fluent (speech); continuously differentiable
hard; solid; stiff; tight; strong; firm (not viscous or easily moved); safe
gradually (progress into a state); in sequence; in order; in turn
to stick; to get stuck; to be unavailable; to be busy; to be piled up (e.g. of work); to halt (in one's speech)
to spin; to make yarn; to spin (a tale); to assemble (e.g. words); to put together
dainty; delicate (e.g. fingers); fine; sensitive; delicate (feelings, sense, etc.); subtle
wonderful; splendid; magnificent
consent; approval; acceptance; agreement; compliance
non-stop talking; speaking indiscreetly; chattering; thin; flimsy
deadly serious; deadly earnest
on purpose; deliberately; intentionally
in that case; (might not be what was expected or hoped for but) if that's the case
completely; entirely; nonchalantly; as if nothing happened
to dodge (e.g. a question); to evade; to sidestep; to give (someone) the slip
to compare; to make a comparison; to compete; to vie
to go against; to fight against; to oppose; to resist; to deny
tap-tap; knock-knock; cough-cough; bark (of a fox); yelp; heavily (e.g. of snow falling)