Synonym for trifling is "loitering"

empty [adjective]

means "behaviour"
expressionless, trifling, stupid, foolish, frivolous, blank

expressionless [adjective]

means "empty"
trifling, stupid, foolish, frivolous, blank

few [adjective]

means "amount"
trifling

frivolous [adjective]

means "trivial"
flimsy, superficial, paltry, petty, trifling, unimportant

fun [noun]

means "play"
frolic, jest, trifling

futile [adjective]

means "trivial"
frivolous, petty, minor, small, nugatory, trifling

idle [adjective]

means "trivial"
insignificant, trifling, unimportant, useless, worthless, vain

inconsiderable [adjective]

means "unsubstantial"
trivial, trifling, slight, shallow, petty, minor

insignificant [adjective]

means "small"
trifling

insubstantial [adjective]

means "unimportant"
inconsequential, insignificant, negligible, immaterial, flimsy, trifling

light [adjective]

means "quantity"
unsubstantial, trivial, trifling, slight, shallow, petty

negligible [adjective]

means "unimportant"
inconsequential, insignificant, insubstantial, immaterial, flimsy, trifling

nonessential [adjective]

means "unimportant"
trifling

nugatory [adjective]

means "futile"
trifling, trivial, vain, worthless

paltry [adjective]

means "trivial"
flimsy, superficial, frivolous, petty, trifling, unimportant

play [noun]

means "entertainment"
fun, frolic, jest, trifling

- translate play

shallow [adjective]

means "trite"
superficial, inconsequential, frivolous, silly, insignificant, trifling

simple [adjective]

means "property"
trivial, trifling

slender [adjective]

means "few"
trifling

slight [adjective]

means "property"
insignificant, petty, trifling, trivial, unimportant, superficial

slim [adjective]

means "property"
insignificant, inconsiderable, remote, small, poor, trifling

small [adjective]

means "size"
unessential, trifling

- translate small

tenuous [adjective]

means "insubstantial"
insignificant, trivial, trifling, unimportant, slight, flimsy

trivial [adjective]

means "idle"
insignificant, trifling, unimportant, useless, worthless, vain

unavailing [adjective]

means "trivial"
insignificant, trifling, unimportant, useless, worthless, vain

unessential [adjective]

means "insignificant"
petty, trifling, trivial, unimportant, superficial, paltry

unimportant [adjective]

means "trivial"
insignificant, trifling, idle, useless, worthless, vain

unnecessary [adjective]