manner of working (noun) modus operandi: manner of operating
Sinonime: captivated, consumed, deep in thought,
engaged, engrossed,
fascinated,
fixed,
gone*, head over heels,
held,
immersed,
intent,
involved,
lost,
preoccupied,
rapt, really into, up to here, wrapped up
Antonime: bored, disinterested,
distracted,
indifferent, uninterested